Primary Aldosteronism: Comprehensive Research Report

1. Disease Information

Overview. Primary aldosteronism (PA) is a group of disorders in which aldosterone production by the adrenal cortex is inappropriately high, relatively autonomous of the renin-angiotensin system, and non-suppressible by sodium loading. The excess aldosterone drives renal sodium retention and potassium/hydrogen wasting, producing volume-expanded, low-renin hypertension with or without hypokalemia. PA is now recognized as the most common identifiable (surgically or pharmacologically correctable) cause of secondary hypertension, present in roughly 5–10% of unselected hypertensive patients and up to 20% of those with resistant hypertension (Cleveland Clinic Journal of Medicine review; PMC10118808).

Key identifiers: - MONDO: MONDO:0001422 (primary hyperaldosteronism); related family: MONDO:0013359, MONDO:0014875 (familial hyperaldosteronism subtypes) - OMIM: #103900 (Hyperaldosteronism, Familial, Type I / GRA); Familial hyperaldosteronism type II (HALD2, CLCN2); type III (HALD3, KCNJ5); type IV (HALD4, CACNA1H); #615474 (Primary Aldosteronism, Seizures, and Neurologic Abnormalities — PASNA, CACNA1D) - Orphanet: ORPHA231637 (surgically correctable PA / aldosterone-producing adenoma); ORPHA251274 (Familial hyperaldosteronism type III); related entries for FH-I (GRA) and FH-II - ICD-10: E26.0 (primary hyperaldosteronism); E26.01 (Conn syndrome); E26.02 (Glucocorticoid-remediable aldosteronism); E26.09 (Other primary hyperaldosteronism) - ICD-11: 5A11 (Primary aldosteronism) - MeSH: D006929 (Hyperaldosteronism)

Synonyms: Conn syndrome/Conn's syndrome (historically restricted to unilateral aldosterone-producing adenoma), primary hyperaldosteronism, aldosteronism, Conn-Louis syndrome, idiopathic hyperaldosteronism (bilateral form).

Evidence base type: Predominantly aggregated, disease-level clinical and molecular evidence — large referral-center cohorts (e.g., PAPY study, PAPPHY, Japan Primary Aldosteronism Study [JPAS], German Conn's Registry), systematic reviews/meta-analyses, and case-report-level genetic descriptions for the ultra-rare familial/monogenic forms. Recent large real-world screening data also derive from EHR-based nationwide cohorts (e.g., the 7.8-million-patient longitudinal screening/diagnosis-trends study, medRxiv 2025.11.13.25340212).

2. Etiology

Disease Causal Factors

PA arises from two broad, non-mutually-exclusive mechanisms: 1. Sporadic somatic mutations in adrenal zona glomerulosa cells that constitutively activate calcium signaling, driving unregulated CYP11B2 (aldosterone synthase) expression — the cause of most aldosterone-producing adenomas (APA) and aldosterone-producing cell clusters (APCC). 2. Germline (inherited) mutations in the same or related ion-transport genes, causing rare monogenic familial hyperaldosteronism (FH) syndromes, typically presenting with bilateral adrenal hyperplasia and early, severe hypertension.

Somatic drivers (APA): Recurrent somatic mutations in genes encoding ion channels/pumps that regulate intracellular calcium and membrane potential account for >50% of APAs. In a large European multicenter cohort of 474 APA patients, somatic mutation prevalence was: KCNJ5 ~38%, CACNA1D ~9.3%, ATP1A1 ~5.3%, ATP2B3 ~1.7% (PMID review via Hypertension/AHA sources); KCNJ5 prevalence is markedly higher in East Asian populations (55–75% in Japan/Taiwan) than Western cohorts (25–50%). CTNNB1 (β-catenin) exon-3 activating mutations, causing constitutive Wnt signaling, are found in ~5% of APAs, often co-occurring with an ion-channel mutation (PMC5620029). A 2024 preprint additionally identifies somatic MCOLN3 mutations as a novel APA driver (bioRxiv 2024.10.20.619295).

• Mechanism (shared endpoint): KCNJ5 mutations render the inward-rectifying K+ channel (Kir3.4) permeable to Na+, causing membrane depolarization; CACNA1D, ATP1A1, and ATP2B3 mutations directly or indirectly increase voltage-gated Ca²⁺ influx. All converge on sustained elevation of intracellular Ca²⁺, which drives CYP11B2 transcription via CaMK signaling → autonomous aldosterone synthesis.

Germline/familial causes (FH types I–IV plus PASNA):

"In FH-II, pathogenic variants in CLCN2 lead to increased chloride efflux, and in FH-III, pathogenic variants in KCNJ5 render the encoded potassium channel permeable to sodium ions, with the resulting membrane depolarization causing voltage-gated calcium influx in both conditions... CACNA1H pathogenic variants in FH-IV directly increase calcium influx" (PMC7999899, Unravelling the Genetic Basis of Primary Aldosteronism).

FH-I (GRA) accounts for ~0.5–1.0% of all PA cases and is autosomal dominant; it is diagnostically important because it responds to glucocorticoid (ACTH) suppression therapy rather than mineralocorticoid receptor antagonism alone.

PASNA (OMIM #615474): Caused by heterozygous, typically de novo, gain-of-function CACNA1D variants (e.g., p.Gly403Asp) altering the S6 pore-lining segment of the Cav1.3 channel; overlaps mechanistically with a subset of somatic CACNA1D-driven APAs and with certain autism-spectrum-associated de novo CACNA1D variants, reflecting the same channel's dual role in adrenal and neuronal excitability.

Risk Factors

Genetic: - Somatic KCNJ5/CACNA1D/ATP1A1/ATP2B3/CTNNB1 mutations (sporadic APA drivers, not inherited) - Germline FH-I to FH-IV and PASNA variants (rare monogenic causes) - GWAS-identified susceptibility loci: A genome-wide association study (1,162 cases, 3,296 controls) identified loci on chromosomes 1, 13, and X; the chromosome 13 locus was male-specific and stronger in bilateral hyperplasia than APA. Candidate genes CASZ1 and RXFP2 are expressed in adrenal tissue, and their overexpression suppresses mineralocorticoid output in adrenocortical cells without affecting cortisol biosynthesis (PMC9440917, Identification of risk loci for primary aldosteronism in genome-wide association studies). - Family history of PA or early-onset stroke (<40 years) — an indication for genetic testing for FH-I. - ARMC5 germline mutations (two-hit tumor-suppressor mechanism) predispose to primary bilateral macronodular adrenocortical disease (PBMAD), which can co-secrete aldosterone and cortisol with distinct somatic ARMC5 "second hits" in individual nodules (PMC12861490).

Environmental/lifestyle: - Age (APCC and somatic-mutation burden accumulate with age; incidence of clinically apparent PA peaks in the 4th–6th decades) - Sex (see Population Demographics) - Obesity, metabolic syndrome, and elevated BMI — more pronounced in bilateral idiopathic hyperaldosteronism (IHA) than APA - Obstructive sleep apnea (OSA): bidirectional relationship; PA prevalence is elevated in resistant-hypertension/OSA populations, and aldosterone excess is hypothesized to worsen upper-airway edema/fluid shift, while intermittent hypoxia may stimulate aldosterone secretion (PMC9556954) - High dietary sodium intake unmasks the hypertensive/hypokalemic phenotype

Protective Factors

No well-established genetic protective variants are documented for PA specifically. CASZ1/RXFP2 overexpression suppressing mineralocorticoid output (identified via GWAS) is a candidate protective mechanism rather than a validated protective allele. Reduced dietary sodium intake blunts the hypokalemic/hypertensive phenotype but does not reduce aldosterone excess itself.

Gene-Environment Interactions

High sodium intake combined with autonomous aldosterone secretion (genetic driver) synergistically worsens hypertension and hypokalemia — the volume-expansion/potassium-wasting phenotype is sodium-dependent, which underlies the use of high-salt provocative testing (saline infusion, oral sodium loading) in confirmatory diagnosis. Aging appears to interact with somatic mutation acquisition: APCCs harboring the same somatic mutations found in APAs accumulate with age in histologically normal adrenal tissue, suggesting a stepwise, age-dependent progression from focal cell clusters to overt adenoma (Journal of the Endocrine Society, PMC/academic.oup.com jes/1/7/787).

Suggested ontology terms: HGNC genes — KCNJ5 (HGNC:6266), CACNA1D (HGNC:1391), ATP1A1 (HGNC:799), ATP2B3 (HGNC:816), CTNNB1 (HGNC:2514), CLCN2 (HGNC:2020), CACNA1H (HGNC:1395), CYP11B1 (HGNC:2591), CYP11B2 (HGNC:2592), ARMC5 (HGNC:25781).

3. Phenotypes

Symptoms and Clinical Signs

Laboratory abnormalities: suppressed plasma renin activity/concentration, elevated plasma aldosterone concentration (PAC), elevated aldosterone-to-renin ratio (ARR), hypokalemia, mild hypernatremia, metabolic alkalosis, elevated urinary potassium excretion despite hypokalemia (inappropriate kaliuresis).

Phenotype Characteristics

• Age of onset: Typically adult-onset (peak diagnosis 30s–60s); familial forms (FH-I, FH-III, PASNA) present in childhood/adolescence with severe, early hypertension.
• Severity: Highly variable — from mild, normokalemic hypertension to severe, treatment-resistant hypertension with profound hypokalemia (especially FH-III with massive bilateral hyperplasia, hypokalemia in >85% of patients).
• Progression: Generally chronic and progressive if untreated, with worsening target-organ damage over time; some cases (APCC-driven) may represent an early/subclinical stage preceding overt PA.
• Frequency of hypokalemia: ~9–37% of PA cases overall depending on cohort and case-detection strategy; markedly higher in FH-III and larger APAs.

Quality of Life Impact

Health-related quality of life (HRQoL) is significantly impaired in untreated PA. "Psychopathological symptoms of anxiety, demoralization, stress, depression and nervousness were more frequently reported in untreated patients with primary aldosteronism than in the general population and patients with hypertension" (JCEM, PMID:29099927). Both adrenalectomy and mineralocorticoid receptor antagonist (MRA) therapy improve HRQoL and psychological symptoms, with significant gains in physical and mental summary scores at 1-year follow-up in Asian cohort studies (PMC8346187). Autonomous cortisol co-secretion (ACS), seen in a subset of PA patients (overlapping with PBMAD/ARMC5 biology), may further contribute to depression/anxiety burden.

4. Genetic/Molecular Information

Causal Genes (summary table)

Variant Classification and Functional Consequences

• Somatic APA variants are gain-of-function with respect to Ca²⁺ signaling: KCNJ5/CLCN2 alterations act indirectly via membrane depolarization; CACNA1D/CACNA1H/ATP1A1/ATP2B3 alter Ca²⁺ handling more directly; CTNNB1 acts through a parallel Wnt/β-catenin proliferative pathway.
• ClinVar entries exist for CACNA1D variants (e.g., NM_000720.4:c.1208G>A, p.Gly403Asp) classified pathogenic for "aldosterone-producing adenoma with seizures and neurological abnormalities," and CACNA1H variants (e.g., NM_021098.3:c.3806G>A, p.Arg1269His) associated with FH-IV.
• Somatic vs. germline: APA driver mutations are acquired, tumor-restricted somatic events (confirmed via tumor-vs-blood sequencing); FH-I through FH-IV and PASNA are germline (constitutional), heritable in autosomal-dominant fashion (or de novo for PASNA).
• Genotype-phenotype correlation: KCNJ5-mutant APAs tend to be larger, histologically heterogeneous (mixed zona fasciculata-like/glomerulosa-like cells) and occur preferentially in younger women; CACNA1D/ATPase-mutant APAs are smaller, histologically homogeneous, zona-glomerulosa-like, and more common in older men (PMC11454283, CACNA1D- and KCNJ5-Mutant APAs Have Opposite 2-Year Clinical Outcomes from Adrenalectomy). KCNJ5 mutation carriers show younger age at diagnosis (42.1 vs 47.6 years) and higher aldosterone levels — "a more florid phenotype."

Modifier Genes

CASZ1 and RXFP2 (GWAS-nominated) may modulate mineralocorticoid output and disease susceptibility rather than acting as primary causal genes.

Epigenetic Information

DNA methylation changes at the CYP11B2 locus have been documented in KCNJ5-mutant adrenocortical tumors, potentially contributing to aberrant aldosterone synthase regulation (PMC11255478, Adrenocortical Tumor Associated With Pathogenic Variant in KCNJ5 and DNA Methylation of CYP11B2). Broader epigenomic (histone/chromatin) characterization of PA adrenal tissue remains an active but less mature research area compared to genomic sequencing.

Chromosomal Abnormalities

No recurrent aneuploidy or large structural rearrangement is a primary cause of typical PA; the FH-I chimeric gene is itself an intragenic structural (crossover) event on 8q24.3 rather than a whole-chromosome abnormality. ARMC5-driven PBMAD shows tumor-restricted loss of heterozygosity (LOH) as its somatic "second hit."

5. Environmental Information

• Environmental/toxicological factors: No established environmental toxin or exposure directly causes PA in the way seen for some other endocrine disorders; PA is overwhelmingly genetically/molecularly driven at the tumor or channel level.
• Lifestyle factors: High dietary sodium intake exacerbates the hypertensive and hypokalemic phenotype and is used diagnostically (oral salt-loading/saline infusion confirmatory tests). Obesity and metabolic syndrome are associated with higher rates of bilateral idiopathic hyperaldosteronism specifically. Obstructive sleep apnea is a frequently co-occurring, mechanistically intertwined condition (bidirectional relationship with excess fat tissue/adipokine secretion implicated).
• Infectious agents: Not applicable — PA is not an infectious disease.
• Note on apparent mineralocorticoid excess: Licorice (glycyrrhizin) ingestion causes a mimicking syndrome (apparent mineralocorticoid excess via 11β-HSD2 inhibition) with low aldosterone/renin, and is a key differential diagnosis rather than a cause of true PA.

6. Mechanism / Pathophysiology

Ordered Causal Chain

1. A somatic mutation in a zona glomerulosa cell (KCNJ5, CACNA1D, ATP1A1, ATP2B3, or CTNNB1) — or, in familial forms, a germline mutation (CLCN2, KCNJ5, CACNA1H) or the CYP11B1/CYP11B2 chimeric gene — leads to dysregulated ion transport across the zona glomerulosa cell membrane.
2. For channel/pump mutations, this leads to sustained membrane depolarization (via aberrant Na+ or Cl⁻ flux) or a direct increase in voltage-gated Ca²⁺ channel activity.
3. Membrane depolarization results in opening of voltage-gated Ca²⁺ channels and leads to sustained elevation of intracellular Ca²⁺ concentration — "the central switch for aldosterone production" (PMC review, JCEM 101:3874).
4. Elevated intracellular Ca²⁺ activates calcium/calmodulin-dependent kinase (CaMK) signaling, which drives transcriptional upregulation of CYP11B2 (aldosterone synthase), the enzyme that catalyzes 11-deoxycorticosterone → corticosterone → 18-hydroxycorticosterone → aldosterone.
5. In CTNNB1-mutant cells, constitutive Wnt/β-catenin pathway activation independently promotes both zona glomerulosa cell proliferation (adenoma formation) and CYP11B2 expression, often acting in parallel with, or synergistically with, an ion-channel mutation.
6. In FH-I (GRA), the CYP11B1/CYP11B2 chimeric gene results in ectopic, ACTH-driven (rather than angiotensin-II/potassium-driven) aldosterone synthase expression in the zona fasciculata, bypassing normal RAAS regulation entirely — this is a distinct upstream mechanism from the calcium-signaling route.
7. Autonomous CYP11B2 activity causes aldosterone secretion that is inappropriately high relative to sodium/volume status and not suppressed by volume expansion (the biochemical definition of PA), unlike physiological aldosterone secretion which is normally stimulated by angiotensin II (via AT1 receptors) and hyperkalemia.
8. Excess circulating aldosterone binds the mineralocorticoid receptor (MR) in the renal distal nephron, leading to upregulated epithelial sodium channel (ENaC) activity, causing increased sodium reabsorption and potassium/hydrogen ion secretion.
9. Increased sodium reabsorption results in extracellular volume expansion, which suppresses renin release from the juxtaglomerular apparatus (completing the "low renin" biochemical signature) and contributes to hypertension via increased cardiac preload and peripheral vascular resistance.
10. Concurrent potassium wasting leads to hypokalemia (in a subset of patients, generally those with higher aldosterone burden — e.g., FH-III, larger APAs) and hydrogen ion loss leads to metabolic alkalosis.
11. In parallel to its classical renal/hemodynamic effects, aldosterone/MR activation in non-epithelial tissues (cardiac myocytes/fibroblasts, vascular smooth muscle/endothelium, renal mesangial cells/podocytes, macrophages) triggers non-genomic and genomic pro-inflammatory and pro-fibrotic programs — increased NADPH oxidase-derived reactive oxygen species (ROS), macrophage-mediated inflammation, and TGF-β/collagen deposition.
12. This tissue-level inflammation and fibrosis leads to, largely independent of blood pressure level, increased risk of left ventricular hypertrophy, myocardial and vascular fibrosis, endothelial dysfunction, glomerular injury/proteinuria, and renal fibrosis — explaining why PA carries a substantially higher cardiovascular and renal event rate than essential hypertension at matched blood pressure (Lancet Diabetes Endocrinol meta-analysis, PMID:29129575: stroke OR 2.58, coronary artery disease OR 1.77, atrial fibrillation OR 3.52, heart failure OR 2.05, LVH OR 2.29).
13. Long-term, unchecked steps 8–12 culminate in the clinical endpoints of resistant hypertension, target-organ damage (cardiac, renal, cerebrovascular), and the psychiatric/quality-of-life burden described in Section 3 — the latter mechanism (direct CNS/mood effects of MR overactivation) is comparatively more inferred than directly demonstrated in humans, drawing on animal and cross-sectional psychopathology data.

Additional Mechanistic Detail by Category

• Molecular pathways: Calcium/calmodulin signaling (central node); Wnt/β-catenin signaling (CTNNB1-mutant subset); renin-angiotensin-aldosterone system (RAAS) — dysregulated/bypassed; cAMP/PKA-ACTH signaling (ectopically hijacked in FH-I).
• Cellular processes: Zona glomerulosa cell proliferation and clonal expansion (adenoma formation); adrenocortical zonation remodeling with age producing aldosterone-producing cell clusters (APCCs) — subcapsular clusters of CYP11B2⁺ cells that frequently harbor the same somatic mutations as APAs and increase in number/area with age, potentially representing a precursor lesion or a distinct, subclinical driver of age-related hypertension (JCEM 107(9):2439; J Endocr Soc 1(7):787).
• Protein dysfunction: Loss of ion selectivity (KCNJ5/Kir3.4 channel), gain-of-function calcium channel gating (CACNA1D/Cav1.3, CACNA1H/Cav3.2), altered pump stoichiometry (ATP1A1 Na+/K+-ATPase, ATP2B3 plasma membrane Ca²⁺-ATPase), constitutively stabilized β-catenin (CTNNB1) evading degradation.
• Metabolic changes: Hypokalemic metabolic alkalosis; mineralocorticoid-driven sodium/water retention; adverse effects on glucose metabolism — "glucose metabolism was impaired in PA, regardless of hypokalemia and subclinical hypercortisolism status, and was improved by adrenalectomy, but not spironolactone treatment" (PMC6947343).
• Immune system involvement: Macrophage-mediated renal and cardiac inflammation driven by MR activation in myeloid cells; aldosterone/MR signaling modulates broader immune cell function (T cells, macrophages) contributing to a pro-inflammatory state (PMC4581510, Modulation of Immunity and Inflammation by the Mineralocorticoid Receptor and Aldosterone).
• Tissue damage mechanisms: Oxidative stress via NADPH oxidase/mitochondrial ROS; renal fibrosis via mesangial cell proliferation, podocyte injury, and interstitial fibroblast activation; vascular stiffness and endothelial dysfunction; myocardial fibrosis and LVH.
• Biochemical abnormalities: Elevated 18-hydroxycortisol and 18-oxocortisol (hybrid steroids), particularly marked in FH-III; suppressed plasma renin; elevated PAC/ARR.
• Molecular profiling: Transcriptomic studies (e.g., GEO dataset GSE90867) characterize KCNJ5-mutant APA gene expression signatures; comparative genomic/transcriptomic profiling across genotypes (PMC5979346) shows genotype-specific expression clusters correlating with the histopathologic differences noted above.
• Advanced technologies: Single-cell resolution characterization of APCCs (JCEM 107(9):2439) has defined their transcriptional identity relative to normal zona glomerulosa and APA tissue; whole-genome/targeted sequencing (including in the feline model, below) continues to refine the somatic mutation landscape.

Suggested GO terms: GO:0032341 (regulation of aldosterone biosynthetic process), GO:0006816 (calcium ion transport), GO:0035810 (positive regulation of urine volume — related renal effect), GO:0035810, GO:0043123 (positive regulation of NF-kB — inflammatory arm), GO:0030177 (positive regulation of Wnt signaling pathway, CTNNB1 axis), GO:0071465 (cellular response to elevated intracellular Ca²⁺). CL terms: zona glomerulosa cell (adrenal cortical cell, CL:0002097 adrenal cortex cell or more specific if available), cardiac fibroblast (CL:0002548), macrophage (CL:0000235), podocyte (CL:0000653).

7. Anatomical Structures Affected

Organ Level

• Primary organ: Adrenal gland (cortex, specifically the zona glomerulosa) — UBERON:0002369 (adrenal gland), UBERON:0001236 (zona glomerulosa)
• Secondary/complication organs: Heart (LVH, fibrosis, atrial fibrillation, heart failure), kidney (fibrosis, proteinuria, CKD progression), cerebrovascular system (stroke risk), vasculature (endothelial dysfunction, stiffness), skeletal muscle (hypokalemic weakness), bone (spironolactone shown to reduce bone-turnover markers, implying baseline aldosterone-related bone effects), and to a lesser extent the CNS/psychiatric domain.
• Body systems: Endocrine, cardiovascular, renal, musculoskeletal, and (secondarily) psychiatric/neurological (particularly in PASNA, which also involves the CNS directly via CACNA1D neuronal channels).

Tissue and Cell Level

• Adrenal cortical zona glomerulosa cells (site of CYP11B2 expression and mutation)
• Aldosterone-producing cell clusters (subcapsular, age-associated)
• Renal distal nephron principal cells (site of MR/ENaC-mediated sodium reabsorption) — CL terms: kidney distal convoluted tubule epithelial cell, cortical collecting duct principal cell
• Cardiac myocytes and fibroblasts (fibrosis/hypertrophy)
• Vascular smooth muscle cells and endothelial cells
• Renal podocytes and mesangial cells
• Macrophages infiltrating cardiac and renal tissue

Subcellular Level

• Plasma membrane (site of ion channel/pump dysfunction) — GO:0005886
• Cytoplasm (Ca²⁺ signaling, CaMK activation)
• Nucleus (CYP11B2 transcriptional activation; β-catenin nuclear translocation in CTNNB1-mutant cells) — GO:0005634
• Mitochondria (site of steroidogenic enzyme CYP11B2 itself, an inner mitochondrial membrane enzyme) — GO:0005743/GO:0005759

Localization

• Adrenal disease is typically unilateral (APA, most FH-I/some cases) or bilateral (idiopathic hyperaldosteronism/IHA — the more common subtype overall, ~60% of PA cases vs. ~30% APA; FH-II, FH-III, FH-IV, and PBMAD are characteristically bilateral).
• Adrenal vein sampling (AVS) is required to determine lateralization when surgery is being considered, since CT imaging alone can be misleading regarding lateralization (PMC8845452).

8. Temporal Development

Onset

• Sporadic PA (APA/IHA): Typically adult-onset, most commonly diagnosed in the 30s–60s; can occur at any adult age.
• Familial forms: Childhood-to-adolescent onset is characteristic of FH-I (GRA), FH-III, and PASNA; genetic testing is recommended for onset before age 20 or a family history of PA/early stroke (<40 years).
• Onset pattern: Generally insidious/chronic, though FH-III can present with severe, rapidly evident hypertension in early childhood.

Progression

• Disease course: Chronic, generally progressive without treatment; some evidence supports a stepwise progression from age-related APCCs to overt APA in a subset of patients.
• Progression rate: Variable; FH-III (massive bilateral hyperplasia) tends to be more rapidly and severely progressive than sporadic IHA.
• Disease duration: Chronic/lifelong unless surgically cured (unilateral APA can be cured by adrenalectomy); bilateral disease requires lifelong medical management.

Patterns

• Remission: Surgical cure is achievable in APA via unilateral adrenalectomy (complete biochemical success rates commonly cited in the 30–60% range across cohorts, with higher rates when AVS-guided); bilateral/idiopathic disease is not surgically curable and requires ongoing MRA therapy.
• Critical periods: Early diagnosis before the development of fixed target-organ damage (LVH, renal fibrosis, vascular remodeling) is the key intervention window, since cardiovascular/renal risk appears to begin accruing even at the subclinical stage and is only partially reversible with treatment.

9. Inheritance and Population

Epidemiology

• Prevalence: 5–10% of all hypertensive patients in unselected primary care settings; up to 20% in resistant hypertension. Contemporary broadened screening studies (e.g., SCREENING-PA) report ARR-based prevalence up to 11%, with some estimates as high as 25% depending on diagnostic threshold and population; a treatment-naive-hypertension cohort (CONPASS) found 4–7% prevalence.
• Subtype distribution: Bilateral idiopathic hyperaldosteronism (~60%) is more common than unilateral APA (~30%); rarer subtypes (unilateral hyperplasia, PBMAD, familial forms) make up the remainder.
• Under-recognition: Despite guideline recommendations, screening rates remain low even in high-risk populations such as hypertension-plus-hypokalemia and CKD cohorts (Hypertension, PMID for population-based screening-rate study; AJKD review on underdiagnosis).

For Genetic Etiology

• Inheritance pattern: Autosomal dominant for FH-I (GRA), FH-II (CLCN2), FH-III (KCNJ5), and FH-IV (CACNA1H); PASNA arises typically from de novo heterozygous CACNA1D variants; sporadic APA-driving mutations are somatic, not heritable.
• Penetrance: Generally high but variable within familial pedigrees (e.g., "atypical gene segregation pattern" reported for some CYP11B1/CYP11B2 chimeric-gene families — Hypertension, PMID for chimeric gene study); FH-II shows variable expressivity and reduced penetrance in some kindreds.
• Expressivity: Highly variable, especially in FH-I, where clinical severity correlates with the specific crossover breakpoint of the chimeric gene.
• Genetic anticipation: Not a recognized feature of PA (not a repeat-expansion disorder).
• Germline mosaicism: Not well characterized for PA; theoretically possible for de novo CACNA1D (PASNA) variants but not systematically documented.
• Founder effects: Not prominently described; case series exist across diverse ethnicities (Korean, Japanese, Chinese, and others) for CYP11B1/CYP11B2 GRA kindreds, suggesting recurrent independent crossover events rather than a single founder haplotype.
• Consanguinity: Not a major factor, as most familial forms are autosomal dominant rather than recessive.
• Carrier frequency: Not applicable in the traditional recessive-carrier sense; somatic mutation "carrier frequency" in normal aging adrenal tissue (APCCs) increases with age.

Population Demographics

• Sex ratio and genotype: KCNJ5 somatic mutations are significantly more prevalent in women (49% vs. 19% in men in one series) and associate with a more florid phenotype (younger age, higher aldosterone). ATP1A1 and CACNA1D mutations predominate in men. "Women with the unilateral subtype were younger than men with the same subtype and women with the bilateral subtype" (Hypertension, PMID:31813371-type sex-difference study).
• Age distribution: KCNJ5-mutant APA patients are diagnosed younger (mean ~42 years) than non-KCNJ5-mutant patients (~48 years).
• Ethnic/geographic variation: East Asian populations (Japan, Taiwan, China) show markedly higher rates of KCNJ5-driven APA (55–75%) than Western European/American cohorts (25–50%), a well-replicated geographic/ethnic difference in the somatic mutation spectrum.
• Global prevalence estimate: ~9.4% in hypertensive populations overall per a recent epidemiologic review (MDPI, Primary Hyperaldosteronism: Epidemiology, Diagnosis, and Clinical Associations).

10. Diagnostics

Clinical Tests / Screening

• Screening test: Aldosterone-to-renin ratio (ARR), the recommended first-line test per Endocrine Society and European Society of Hypertension guidelines. A commonly cited cutoff for a positive screen is an ARR >240 (ng/dL)/(ng/mL/h), though thresholds vary by assay/units. Recent data show ARR retains high sensitivity (up to 97.7%) and negative predictive value (~99%) even without medication washout, supporting more pragmatic, broadly applied screening.
• 2024–2025 guideline evolution: The 2024 ESC Hypertension Guidelines recommend systematic ARR-based screening of all adults with confirmed hypertension (a major broadening from prior risk-stratified approaches). The 2025 Endocrine Society revision permits diagnosis based on a biochemical triad (suppressed renin + elevated aldosterone + elevated ARR) without mandatory confirmatory testing in patients with spontaneous hypokalemia and clearly suppressed renin plus high PAC — streamlining diagnosis in unambiguous cases (ScienceDirect 2025 comparative study; PMC12885222, PMC12459304 Taipei positional paper on universal screening).

Confirmatory Testing

• Saline infusion test, oral sodium loading test, fludrocortisone suppression test, or captopril challenge test — used to confirm autonomous, non-suppressible aldosterone secretion when the ARR screen is positive.
• Confirmatory testing is complicated in chronic kidney disease patients (volume-sensitive tests carry additional risk/uncertainty; PMC8312167).

Imaging

• Adrenal CT: Recommended in all confirmed PA patients to exclude adrenocortical carcinoma and provide anatomic guidance; however, CT alone can misclassify unilateral vs. bilateral disease and should not be used alone to determine surgical candidacy in patients seeking a lateralizing cure, especially those >35 years old (per Endocrine Society guideline) or with equivocal imaging.
• Adrenal vein sampling (AVS): The gold standard for lateralization when surgery is being considered; superior outcomes (higher complete biochemical success, lower "absent success") compared with CT-guided adrenalectomy (PMC8845452). Intraprocedural cortisol assessment improves catheterization success confirmation (PMC10754635); partial-pressure-of-oxygen-guided AVS is an emerging refinement (medRxiv 2025.06.29.25330380).
• Molecular imaging (emerging): CYP11B2-targeted PET tracers and ¹¹C-metomidate PET are being explored to non-invasively localize aldosterone-producing lesions and potentially reduce reliance on invasive AVS; ⁶⁸Ga-Pentixafor/⁶⁸Ga-FAPI-04 PET/MR is under active clinical trial evaluation (NCT06756737) for functional adrenal lesion characterization.

Histopathology

• CYP11B2 immunohistochemistry is used to subclassify unilateral PA and confirm which nodule(s) are functionally aldosterone-producing, distinguishing true APA from non-functioning incidentalomas and from APCCs (ScienceDirect, Korean cohort CYP11B2 IHC study).

Genetic Testing

• Recommended for: onset before age 20; family history of PA or stroke at young age (<40); massive bilateral adrenal hyperplasia in a child (suggests FH-III/KCNJ5 germline); clinical suspicion of GRA (FH-I) based on early severe hypertension with family history, hemorrhagic stroke, or a paradoxical biochemical response to dexamethasone.
• Approach: Targeted testing for the CYP11B1/CYP11B2 chimeric gene (specialized long-read sequencing methods such as "GRAde," PMC8750845, improve detection efficiency over older Southern blot/long-PCR methods) for suspected FH-I; germline KCNJ5, CACNA1H, CLCN2, or CACNA1D sequencing/panel testing for suspected FH-III, FH-IV, FH-II, or PASNA respectively. Commercial panels exist (e.g., PreventionGenetics Primary Aldosteronism Panel).
• Somatic tumor genotyping (KCNJ5, CACNA1D, ATP1A1, ATP2B3, CTNNB1) of resected APA tissue is increasingly performed for prognostic/research purposes but is not yet standard preoperative practice.

Clinical Criteria and Differential Diagnosis

• Differential diagnoses include: essential (low-renin) hypertension, renovascular hypertension, pheochromocytoma, Cushing syndrome (including overlap PBMAD/ARMC5 cases with co-secretion), apparent mineralocorticoid excess (licorice ingestion, 11β-HSD2 deficiency), Liddle syndrome (which mimics PA biochemically but with suppressed aldosterone), and drug-induced hypokalemia/hypertension (e.g., diuretics, which must be withdrawn before testing when possible).

Screening for Asymptomatic/High-Risk Individuals

• Universal screening for all hypertensive adults is increasingly advocated (2025 Taipei positional paper), moving beyond the traditional risk-stratified approach (resistant hypertension, hypertension + hypokalemia, hypertension + adrenal incidentaloma, early-onset or severe hypertension, family history).

Suggested NCIT terms: NCIT:C15200 (Adrenalectomy — treatment/diagnostic crossover), NCIT for adrenal vein sampling procedure (interventional radiology), LOINC codes for aldosterone (LOINC:1832-5), renin activity, and ARR panels.

11. Outcome/Prognosis

Survival and Mortality

• PA itself is not classically a survival-limiting condition when treated, but untreated/undertreated disease carries substantially elevated cardiovascular mortality risk relative to essential hypertension of similar severity, largely through excess stroke, MI, and heart failure events.
• Highest-quartile serum aldosterone was associated with a 22% higher risk of all-cause mortality and a 45% increased risk of CKD progression compared with the lowest quartile in a large cohort analysis (Hypertension/AHA CKD-outcomes study, PMID search result).

Morbidity and Function

• Cardiovascular morbidity: Stroke (OR 2.58), coronary artery disease (OR 1.77), atrial fibrillation (OR 3.52), heart failure (OR 2.05), and LVH (OR 2.29) compared with matched essential hypertension (Lancet Diabetes Endocrinol meta-analysis, PMID:29129575) — and this excess risk is independent of blood pressure control, implicating direct aldosterone-mediated tissue toxicity.
• Renal morbidity: Higher rates of proteinuria/albuminuria than essential hypertension; PAC correlates positively with urinary protein excretion and negatively with GFR; each doubling of serum aldosterone associated with an 11% increased risk of CKD progression.
• Metabolic morbidity: Higher rates of diabetes/impaired glucose metabolism and metabolic syndrome, more pronounced in bilateral IHA.
• Quality of life: Impaired HRQoL and elevated anxiety/depression prevalence pre-treatment, substantially improved post-treatment (adrenalectomy more so than MRA alone in some analyses).

Disease Course / Complications

• Complications include: hypertensive emergency/crisis, hemorrhagic stroke (notably reported as an early presenting complication in some GRA/FH-I kindreds), arrhythmia (from hypokalemia and/or atrial fibrosis), heart failure, chronic kidney disease, and osteoporosis-related bone turnover changes (spironolactone shown to reduce bone turnover markers, implying an aldosterone-associated component to bone health, PMC8514385).

Recovery Potential

• Unilateral APA: potential for biochemical and clinical cure with adrenalectomy; the PASO (Primary Aldosteronism Surgical Outcome) consensus criteria standardize reporting of complete/partial/absent biochemical and clinical success, though threshold-setting remains debated.
• Bilateral disease: not curable surgically (except selected unilateral adrenalectomy in bilateral disease showing partial benefit in some patients, PMID:36207420), managed long-term with MRAs ± newer aldosterone synthase inhibitors.
• Even after "cure," some degree of residual target-organ damage (vascular stiffness, myocardial fibrosis) may persist, underscoring the importance of early diagnosis.

Prognostic Factors

• Genotype (CACNA1D/ATPase-mutant vs. KCNJ5-mutant APA) predicts differential postoperative outcomes — "opposite 2-year clinical outcomes from adrenalectomy" explained by different cellular origin/histology (PMC11454283).
• Duration of untreated hypertension, degree of hypokalemia, presence of autonomous cortisol co-secretion, and baseline renal function are recognized prognostic modifiers.

12. Treatment

Pharmacotherapy

• Mineralocorticoid receptor antagonists (MRAs): First-line medical therapy for bilateral IHA and for APA patients who decline or are not candidates for surgery.
• Spironolactone (NCIT:C29073-type steroidal MRA; CHEBI): non-selective MRA, also antagonizes androgen and progesterone receptors (causing gynecomastia, menstrual irregularity as class-specific side effects); shown to offer slightly better diastolic BP reduction than eplerenone but with greater hyperkalemia risk.
• Eplerenone: selective MRA, better side-effect tolerability, generally requires higher/more frequent dosing for equivalent BP control.
• Finerenone (nonsteroidal MRA) is being compared head-to-head against spironolactone in PA (NCT06164379).
• FH-I (GRA)-specific therapy: Low-dose glucocorticoid (e.g., prednisolone or dexamethasone) to suppress ACTH-driven ectopic aldosterone synthase expression — a genotype-directed precision therapy.

Advanced Therapeutics — Aldosterone Synthase Inhibitors (ASIs), a genuinely new drug class

• Baxdrostat (brand name Baxfendy): FDA-approved (first-in-class oral aldosterone synthase inhibitor) for uncontrolled/resistant hypertension; in a phase 2a study of 15 PA patients, baxdrostat "resolved or reduced the severity of hypertension, excessive aldosterone production, and hypokalemia" (NEJM, PMID/DOI 10.1056/NEJMc2508629).
• Lorundrostat: another nonsteroidal ASI, in late-stage clinical development/regulatory review.
• ASIs work upstream of the mineralocorticoid receptor by directly inhibiting CYP11B2 enzymatic activity, offering mechanism-based specificity over MRAs (which block the receptor downstream regardless of ligand source) and, in principle, reduced off-target steroid-receptor side effects — though selectivity over the closely related CYP11B1 (cortisol synthesis) enzyme is a key pharmacologic design challenge, since off-target CYP11B1 inhibition risks cortisol insufficiency.

Gene/Cell/RNA-based therapies

Not currently applicable/approved for PA — the disease is managed via small-molecule and surgical approaches; no gene therapy, cell therapy, or RNA-based therapeutic is in clinical use or advanced trials for PA specifically.

Surgical and Interventional

• Unilateral (laparoscopic) adrenalectomy: Treatment of choice for confirmed unilateral APA (AVS-lateralized); can produce biochemical and clinical cure. NCIT:C15329 (Surgical Procedure) is the appropriate treatment-action term; specify with therapeutic_modality: SURGERY.
• Cortical-sparing (partial) adrenalectomy: Emerging technique for bilateral APA to preserve adrenal cortical function while removing functioning nodules (PMC10702625).
• Thermal ablation: Emerging minimally invasive alternative for APA in select patients (biorxiv thermal-therapies mouse-model study reflects ongoing preclinical work toward this).

Supportive Care

• Potassium supplementation for symptomatic hypokalemia pending definitive treatment.
• Dietary sodium restriction as an adjunct to reduce the hypertensive/hypokalemic phenotype.

Experimental / Clinical Trials

• NCT06164379 — Finerenone vs. spironolactone in PA
• NCT07137364 — Spironolactone combined with antihypertensives in PA
• NCT05432167 — CIN-107 (lorundrostat) for uncontrolled hypertension with CKD
• NCT04007406 — Phase II study in PA patients (aldosterone synthase inhibitor program)
• NCT06756737 — ⁶⁸Ga-Pentixafor/⁶⁸Ga-FAPI-04 PET/MR functional adrenal imaging

Treatment Outcomes

• MRA therapy and adrenalectomy both improve blood pressure, hypokalemia, and HRQoL; adrenalectomy has been shown to improve glucose metabolism where spironolactone does not.
• PASO consensus criteria are used to grade surgical success (complete/partial/absent biochemical and clinical success).
• Common MRA adverse events: hyperkalemia, gynecomastia/menstrual irregularity (spironolactone), postural hypotension.

Treatment Strategy / Precision Medicine

• Genotype-guided treatment is emerging: FH-I responds specifically to glucocorticoid suppression; genotype (KCNJ5 vs. CACNA1D/ATPase) may eventually inform prognosis-based counseling regarding expected adrenalectomy outcome.
• Combination therapy (MRA + ASI, or MRA + standard antihypertensives) is used for refractory cases and is under active trial investigation.

Suggested NCIT/CHEBI terms: NCIT:C15986 (Pharmacotherapy) as generic treatment_term paired with therapeutic_agent CHEBI:9184 (spironolactone) or CHEBI:465305 (eplerenone); NCIT:C15329 (Surgical Procedure) for adrenalectomy; therapeutic_modality SMALL_MOLECULE for MRAs and ASIs, SURGERY for adrenalectomy.

13. Prevention

Prevention Levels

• Primary prevention: Not applicable in the traditional sense (PA is not preventable via vaccination or avoidance of a discrete exposure), though dietary sodium moderation may blunt phenotypic severity in genetically predisposed individuals.
• Secondary prevention: Broadened/universal ARR-based screening of hypertensive patients (as endorsed by 2024 ESC and 2025 Endocrine Society guidance) constitutes the primary secondary-prevention strategy, enabling earlier detection before irreversible target-organ damage accrues.
• Tertiary prevention: Prompt treatment (surgical or pharmacologic) of confirmed PA reduces — though does not always fully reverse — excess cardiovascular and renal risk; regular monitoring for LVH, renal function decline, and psychiatric symptoms in diagnosed patients.

Screening and Early Detection

• Risk-stratified screening indications (traditional): resistant hypertension, hypertension with spontaneous or diuretic-induced hypokalemia, hypertension with adrenal incidentaloma, early-onset (<40 years) or severe hypertension, hypertension with family history of PA or early stroke, hypertension with obstructive sleep apnea, and first-degree relatives of a PA patient.
• Universal screening (emerging paradigm): All hypertensive adults, per the 2025 Taipei positional paper and increasingly aligned major-society guidance.
• Genetic screening: Family cascade testing recommended once a proband is confirmed to carry a germline FH variant (particularly FH-I/GRA, given its autosomal dominant inheritance and treatable, genotype-specific therapy).

Counseling

• Genetic counseling is indicated for families with confirmed FH-I, FH-II, FH-III, FH-IV, or PASNA, given autosomal dominant (or de novo) inheritance patterns and the availability of genotype-specific management (glucocorticoid suppression for FH-I).

Public Health / Prophylaxis

• No specific environmental/public-health intervention (e.g., sanitation, vector control) applies, as PA is not an infectious or environmentally-transmitted disease. Population-level dietary sodium reduction campaigns provide general hypertension benefit that may partially mitigate PA's phenotypic expression but do not address its underlying cause.

14. Other Species / Natural Disease

Taxonomy and Naturally Occurring Disease

• Cats (Felis catus, NCBITaxon:9685): Feline hyperaldosteronism from aldosterone-secreting adrenal tumors is a well-recognized, naturally occurring veterinary counterpart, and a 2024/2025 whole-genome/RNA-sequencing study of 13 cats (8 carcinomas, 5 adenomas) identified somatic GNAQ, CTNNB1, and CACNA1C mutations — CTNNB1 mirroring a known human APA driver, and the CACNA1C mutation occurring at a residue analogous to a common human CACNA1D mutation (Hypertension, AHA, 2024/PMC11578054). Notably, no mutations were found in KCNJ5, CACNA1D, ATP1A1, or ATP2B3 in cats — a species difference — and feline adrenal tissue shows much higher baseline CACNA1C than CACNA1D expression (opposite the human pattern). "It is, therefore, likely that both species have shared underlying selection pressures for mutations that increase aldosterone secretion" (PMC11578054).
• Dogs (Canis familiaris): Aldosterone-producing adrenal adenomas are reported but comparatively rare relative to cats; when present, they cause hypertension and hypokalemia analogous to the human/feline disease.

Comparative Biology

• The convergence on Wnt/β-catenin (CTNNB1) and L-type calcium channel (CACNA1D/CACNA1C) pathway activation across humans and cats, despite species-specific differences in which exact channel gene is mutated, supports a conserved final-common mechanistic pathway (Ca²⁺-driven CYP11B2 activation and/or Wnt-driven proliferation) for autonomous aldosterone secretion across mammals.
• Zoonotic potential: Not applicable — PA is a non-communicable endocrine/neoplastic disease.

15. Model Organisms

Genetic (Mouse) Models

• Cacna1d gain-of-function knock-in mice (e.g., Cacna1d^Ile772Met/+^): recapitulate features of PASNA, including elevated aldosterone and neurologic/motor abnormalities; treatment with the L-type calcium channel blocker isradipine ameliorated both intracellular calcium/aldosterone elevation in zona glomerulosa cells and rotarod motor performance deficits, providing translational proof-of-concept for calcium-channel-blocker repurposing in PASNA and possibly CACNA1D-driven APA (PMC10619505).
• ClC-2 (Clcn2) gain-of-function mouse models: recapitulate FH-II, showing elevated aldosterone and blood pressure consistent with the human chloride-channel mechanism (PMC6856192, Elevated aldosterone and blood pressure in a mouse model of familial hyperaldosteronism with ClC-2 mutation).
• Xenograft/cell-line-based mouse models: HAC15 human adrenocortical carcinoma cells inoculated into immunodeficient mice partially replicate genetic features of human APA but are limited — this model "only produces aldosterone from angiotensin II stimulation" rather than fully autonomous secretion, illustrating an important translational gap: current models capture upstream genetic/channel biology (Cacna1d, Clcn2 knock-ins) or partial hormonal responsiveness (xenografts), but no single model fully recapitulates spontaneous, autonomous, tumor-forming human APA biology.
• A biochemical mouse model of PA characterized for thermal therapy development (bioRxiv 2024.05.07.592955) represents ongoing efforts to create better preclinical platforms for testing novel interventions (e.g., ablation techniques).

Model Characteristics: Recapitulation and Limitations

• Channel-mutant knock-in mice (Cacna1d, Clcn2) faithfully reproduce the core biochemical phenotype (elevated aldosterone, hypertension, and for Cacna1d, the associated neurologic phenotype) and are valuable for mechanistic dissection and drug testing (e.g., isradipine).
• They generally do not reproduce spontaneous adenoma formation or the somatic clonal-expansion process seen in human APA, since the mutation is germline/constitutive rather than a focal somatic event in a subset of cells — a key human-model mismatch relevant to interpreting knock-in mouse data as a model for sporadic APA versus for the germline familial syndromes they were designed to model.
• Xenograft models capture tumor-forming human adrenocortical cell biology but lack normal zona-glomerulosa regulatory context and autonomous (non-angiotensin-II-dependent) secretion.

Applications

• Testing genotype-specific pharmacologic interventions (e.g., calcium channel blockers for CACNA1D-driven disease)
• Dissecting calcium-signaling-to-CYP11B2-transcription mechanisms
• Preclinical development of novel ablative/thermal therapies
• Investigating aldosterone's direct cardiac/renal/CNS effects independent of blood pressure, using aldosterone-infusion or MR-overexpression mouse models (a broader mineralocorticoid-excess modeling tradition, distinct from PA-specific genetic models)

Resources

• MGI (Mouse Genome Informatics) for Cacna1d, Clcn2 allele records
• GEO (e.g., GSE90867) for KCNJ5-mutant APA transcriptomic data (human, but relevant to cross-species comparative use)

Summary of Key Ontology Term Suggestions

Notes on Evidence Gaps

• Epigenomic (DNA methylation/chromatin) characterization of PA adrenal tissue is comparatively less developed than the somatic genomic landscape.
• No fully autonomous, spontaneously tumor-forming mouse model of sporadic APA exists; current genetic models best represent the rarer germline/familial syndromes.
• OBI-style structured evidence for some newer diagnostic modalities (CYP11B2-targeted PET) is still emerging in the primary literature and was not exhaustively covered here.
• Direct mechanistic (rather than correlative) human evidence for aldosterone's CNS/mood effects remains more indirect than the well-established renal/cardiovascular fibrosis mechanisms.

Sources: Orphanet: rare surgically correctable form of primary aldosteronism · OMIM #615474 PASNA · Aldosterone-Producing Adenoma With a Somatic KCNJ5 Mutation · Genetic spectrum of somatic mutations in APA · CTNNB1 Mutation in APA · Unravelling the Genetic Basis of Primary Aldosteronism · Genetics of Primary Aldosteronism (Hypertension/AHA) · Broadening PA Screening: Alignment Across Guidelines · Universal Screening for PA: 2025 Taipei Positional Paper · Pathogenesis and treatment of primary aldosteronism (Nat Rev Endocrinol) · Hyperaldosteronism – Endotext · Prevalence of Hypokalemia and PA in 5100 Patients · Cardiovascular events and target organ damage in PA vs essential hypertension (Lancet Diabetes Endocrinol) · Cerebro-Cardiovascular Risk, Target Organ Damage in PA · Comparison between AVS and CT · Prognosis of adrenalectomy: CT vs AVS meta-analysis · Phase 2a Study of Baxdrostat in PA (NEJM) · Comparison of medical treatments for primary hyperaldosteronism · Spironolactone and bone turnover · 8310 CACNA1D- and KCNJ5-Mutant APAs opposite outcomes · Aldosterone-Producing Cell Clusters single-cell characterization · APCCs accumulate with age · Diverse pathological lesions of PA · Sex Difference in Subtype Distribution and Age at Diagnosis · Primary Hyperaldosteronism: Epidemiology, Diagnosis, and Clinical Associations · Somatic GNAQ, CTNNB1, and CACNA1C Mutations in Cat Aldosterone-Secreting Tumors · Interplay Between Mineralocorticoid System, Inflammation, and Kidney Disease · Modulation of Immunity and Inflammation by MR and Aldosterone · GRAde long-read sequencing for GRA · A New Presentation of the Chimeric CYP11B1/CYP11B2 Gene · Third case report of PASNA de novo CACNA1D · Isradipine therapy in Cacna1d mouse model · de novo CACNA1D variant congenital hyperinsulinism/hyperaldosteronism · Identification of risk loci for PA in GWAS · PA and obstructive sleep apnea · Primary Aldosteronism in CKD: BP control and outcomes · Underdiagnosis of Primary Aldosteronism (AJKD) · SFE/SFHTA/AFCE consensus part 5: Genetic diagnosis · Molecular Basis of Primary Aldosteronism and Adrenal Cushing Syndrome · Primary Bilateral Macronodular Adrenocortical Disease with distinct ARMC5 mutations · Anxiety, Depression, and Impaired QoL in PA · Health-Related QoL and Mental Health in PA: Systematic Review · Improvement in QoL after PA treatment: Asian Cohort · Effects of PA and treatment on glucose metabolism · Comparative Genomics and Transcriptome Profiling in PA · Adrenocortical Tumor with KCNJ5 variant and CYP11B2 DNA methylation · Somatic Mutations in MCOLN3 in APA (bioRxiv) · Characterization of a Biochemical Mouse Model of PA for Thermal Therapies

Reference Validation

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Quotes not found in the cited source

Searched the abstract, any retrieved full text, and the title. A quote drawn from a part of the paper that was not retrieved will appear here too, so check before treating one as invented:

3 of these was searched against an abstract alone, with no full text retrieved - marked abstract only below. Where full text can be fetched, re-running with it will settle them; where the source publishes only a summary to PubMed, as GeneReviews chapters do, it will not, and the quote has to be checked by hand against the chapter itself.

• PMC:PMC7999899 (abstract only): "In FH-II, pathogenic variants in CLCN2 lead to increased chloride efflux, and in FH-III, pathogenic variants in KCNJ5 render the encoded potassium channel permeable to sodium ions, with the resulting membrane depolarization causing voltage-gated calcium influx in both conditions... CACNA1H pathogenic variants in FH-IV directly increase calcium influx"
• closest text in source: "On the other hand, germline variants in CLCN2, KCNJ5, CACNA1H, and CACNA1D genes have been implicated in the pathogenesis of the familial forms of PA, FH-II, FH-III, and F-IV, as well as PA associated with seizures and neurological abnormalities"
• PMID:29099927: "Psychopathological symptoms of anxiety, demoralization, stress, depression and nervousness were more frequently reported in untreated patients with primary aldosteronism than in the general population and patients with hypertension"
• closest text in source: "Januar 2018):Anxiety, Depression, and Impaired Quality of Life in Primary Aldosteronism: Why We shouldn’t Ignore It!In: Journal of Clinical Endocrinology & Metabolism, Bd"
• PMC:PMC6947343 (abstract only): "glucose metabolism was impaired in PA, regardless of hypokalemia and subclinical hypercortisolism status, and was improved by adrenalectomy, but not spironolactone treatment"
• closest text in source: "Glucose metabolism was impaired in PA, regardless of hypokalemia and SH status, and was improved by adrenalectomy, but not spironolactone treatment."
• PMID:31813371 (abstract only): "Women with the unilateral subtype were younger than men with the same subtype and women with the bilateral subtype"
• Text part not found as substring: 'Women with the unilateral subtype were younger than men with the same subtype and women with the bilateral subtype' (note: only abstract available for PMID:31813371, full text may contain this excerpt)

References that may not be about this subject

These identifiers resolve, so they are not fabrications, but the records they resolve to share almost none of this report's vocabulary. That is a clue and not a verdict - a paper can be relevant in ways its title and abstract do not spell out - so read them before deciding:

• PMID:31813371 (1 mention) - Three-manifold quantum invariants and mock theta functions.
• shared terms: none

Weighed against this report's own most characteristic terms: aldosterone, hypertension, apa, cacna1d, disease, patient, adrenal, hypokalemia, fh-i, clinical, primary, bilateral, kcnj5, cyp11b2, gene, somatic, genetic, mutation, cell, adrenalectomy.

Quotes that could not be checked

There was no text to compare these against, so they are neither confirmed nor contradicted:

• DOI:10.1056/NEJMc2508629: "resolved or reduced the severity of hypertension, excessive aldosterone production, and hypokalemia"
• Reference resolved but exposes no abstract or full text to search