Meniere's Disease

name: Meniere's Disease
creation_date: '2026-01-09T07:15:51Z'
updated_date: '2026-02-27T21:53:01Z'
category: Complex
disease_term:
  preferred_term: Meniere disease
  term:
    id: MONDO:0007972
    label: Meniere disease
parents:
- Inner Ear Diseases
- Vestibular Disorders
pathophysiology:
- name: Endolymphatic Hydrops
  description: >
    Meniere's disease is characterized by distension of the endolymphatic space
    (endolymphatic hydrops) due to impaired reabsorption of endolymph or excess
    production. This results in rupture of the membranous labyrinth and mixing
    of endolymph and perilymph, leading to vestibular and cochlear dysfunction.
  evidence:
  - reference: PMID:27083887
    supports: SUPPORT
    snippet: "Over 75 years ago, endolymphatic hydrops was discovered as the pathologic correlate of Menière's disease."
    explanation: "This review confirms endolymphatic hydrops as the pathologic correlate of Meniere's disease."
- name: Ion Transport Dysfunction
  description: >
    Abnormal regulation of fluid and ion homeostasis in the inner ear, particularly involving
    potassium transport in the stria vascularis and endolymphatic sac, contributes to endolymph
    accumulation and hydrops formation. Dysregulation of Na+/K+-ATPase, NKCC1, and K+ channels
    disrupts the electrochemical gradients required for normal endolymphatic fluid balance.
  biological_processes:
  - preferred_term: potassium ion transport
    term:
      id: GO:0006813
      label: potassium ion transport
  - preferred_term: sodium ion transport
    term:
      id: GO:0006814
      label: sodium ion transport
  - preferred_term: water homeostasis
    term:
      id: GO:0030104
      label: water homeostasis
  evidence:
  - reference: PMID:29436285
    supports: SUPPORT
    snippet: "on ELS epithelium. AQP2 expression density was significantly elevated in MD"
    explanation: "Immunohistochemical study identifies AQP2 upregulation as a key molecular abnormality in MD endolymphatic sac"

- name: Autoimmune and Inflammatory Mechanisms
  description: >
    Elevated inflammatory markers and autoantibodies have been found in some patients,
    suggesting that immune-mediated inner ear damage may contribute to disease
    pathogenesis in a subset of cases. Local (inner ear/endolymphatic sac) and systemic immune
    activation includes cytokine signaling and NF-κB pathway engagement. TWEAK-FN14 receptor
    signaling and dysregulated Fcγ receptor polymorphisms contribute to immune complex-mediated injury.
  biological_processes:
  - preferred_term: inflammatory response
    term:
      id: GO:0006954
      label: inflammatory response
  - preferred_term: NF-kB signaling
    term:
      id: GO:0038123
      label: nuclear factor-kappa B signaling
  - preferred_term: response to cytokine
    term:
      id: GO:0071345
      label: cellular response to cytokine stimulus
  evidence:
  - reference: PMID:35280304
    supports: SUPPORT
    snippet: "Up-regulated expression of interferon-γ, interleukin-6 and tumor necrosis factor-α in the endolymphatic sac."
    explanation: "Study documents elevated pro-inflammatory cytokines (IFN-γ, IL-6, TNF-α) in MD endolymphatic sac tissue"
  - reference: PMID:29326686
    supports: SUPPORT
    snippet: "Carriers of the risk genotype may develop an NF-κB-mediated inflammatory response in MD."
    explanation: "Demonstrates TWEAK-FN14-NF-κB pathway activation as key inflammatory mechanism in MD"
  - reference: PMID:22053211
    supports: SUPPORT
    snippet: "MD displays an elevated prevalence of systemic AD such as RA, SLE and AS."
    explanation: "Large case-control study establishes association between MD and systemic autoimmune disease"
  - reference: PMID:21208440
    supports: SUPPORT
    snippet: "Polymorphisms of CD16A and CD32 Fcγ receptors and circulating immune complexes in Ménière's disease."
    explanation: "Case-control study identifies Fcγ receptor polymorphisms and immune complex dysregulation in MD"

- name: Blood-Labyrinth Barrier Dysfunction and Oxidative Stress
  description: >
    The blood-labyrinth barrier (BLB) maintains inner-ear homeostasis through tight junctions between
    endothelial cells and pericytes. In MD, increased vascular permeability and oxidative/nitrosative
    stress damage the BLB, leading to edema and epithelial dysfunction. Elevated iNOS and nitrotyrosine
    levels indicate oxidative stress-mediated cascading cellular injury.
  biological_processes:
  - preferred_term: response to oxidative stress
    term:
      id: GO:0006979
      label: response to oxidative stress
  evidence:
  - reference: PMID:28325925
    supports: SUPPORT
    snippet: "Meniere's disease specimens revealed differential ultrastructural pathological changes in the cellular elements of the microvasculature."
    explanation: "Ultrastructural study documents pathological BLB changes including endothelial and pericyte damage in MD"
  - reference: PMID:30233382
    supports: SUPPORT
    snippet: "We proposed that oxidative stress mediated the damage to the vestibular endorgan and the BLB in MD."
    explanation: "Documents oxidative stress as key pathogenic mechanism in MD blood-labyrinth barrier dysfunction"

phenotypes:
- name: Episodic Vertigo
  description: >
    Recurrent attacks of spinning vertigo lasting 20 minutes to several hours,
    often accompanied by nausea and vomiting. Episodes are unpredictable and
    can be severely debilitating.
  phenotype_term:
    preferred_term: paroxysmal vertigo
    term:
      id: HP:0010532
      label: Paroxysmal vertigo
  evidence:
  - reference: PMID:27083887
    supports: SUPPORT
    snippet: "episodic attacks of vertigo, fluctuating hearing loss, tinnitus, aural pressure"
    explanation: "Confirms vertigo as cardinal episodic manifestation of MD"
  - reference: PMID:22053211
    supports: SUPPORT
    snippet: "episodes of vertigo associated with hearing loss and tinnitus"
    explanation: "Large epidemiological study documents episodes of vertigo as defining MD feature"

- name: Sensorineural Hearing Loss
  description: >
    Fluctuating, progressive hearing loss initially affecting low frequencies,
    eventually becoming permanent and affecting all frequencies as the disease
    progresses.
  phenotype_term:
    preferred_term: low-frequency sensorineural hearing impairment
    term:
      id: HP:0008573
      label: Low-frequency sensorineural hearing impairment
  evidence:
  - reference: PMID:27083887
    supports: SUPPORT
    snippet: "episodic attacks of vertigo, fluctuating hearing loss, tinnitus, aural pressure"
    explanation: "Establishes fluctuating sensorineural hearing loss as core MD feature"
  - reference: PMID:22053211
    supports: SUPPORT
    snippet: "MD, an inner ear disorder characterized by episodes of vertigo associated with hearing loss and tinnitus"
    explanation: "Confirms hearing loss as cardinal MD manifestation in large epidemiological study"

- name: Tinnitus
  description: >
    Ringing, buzzing, or roaring sounds in the affected ear, often low-pitched
    and fluctuating. May become constant with disease progression.
  phenotype_term:
    preferred_term: tinnitus
    term:
      id: HP:0000360
      label: Tinnitus
  evidence:
  - reference: PMID:27083887
    supports: SUPPORT
    snippet: "episodic attacks of vertigo, fluctuating hearing loss, tinnitus, aural pressure"
    explanation: "Confirms tinnitus as defining component of MD clinical tetrad"
  - reference: PMID:22053211
    supports: SUPPORT
    snippet: "episodes of vertigo associated with hearing loss and tinnitus"
    explanation: "Epidemiological evidence reaffirms tinnitus as hallmark MD symptom"

- name: Aural Fullness
  description: >
    Sensation of pressure or fullness in the affected ear, often preceding
    or accompanying vertiginous episodes.
  phenotype_term:
    preferred_term: aural fullness
    term:
      id: HP:0031704
      label: Abnormal ear physiology
  evidence:
  - reference: PMID:27083887
    supports: SUPPORT
    snippet: "episodic attacks of vertigo, fluctuating hearing loss, tinnitus, aural pressure"
    explanation: "Documents aural pressure/fullness as diagnostic feature of MD clinical presentation"

- name: Nausea and Vomiting
  description: >
    Autonomic symptoms accompanying acute vertigo episodes due to vestibular
    system dysfunction.
  phenotype_term:
    preferred_term: nausea and vomiting
    term:
      id: HP:0002017
      label: Nausea and vomiting
treatments:
- name: Low-Sodium Diet
  description: >
    Dietary sodium restriction to reduce fluid retention and minimize
    endolymphatic hydrops. Often combined with diuretics. First-line conservative
    management that is recommended as part of long-term treatment strategy.
  treatment_term:
    preferred_term: dietary intervention
    term:
      id: MAXO:0000088
      label: dietary intervention
  evidence:
  - reference: PMID:15090872
    supports: SUPPORT
    snippet: "Initial management of Ménière's disease can involve a low-salt diet and a diuretic."
    explanation: "Establishes low-sodium diet as first-line initial management approach"

- name: Diuretic Therapy
  description: >
    Thiazide diuretics or acetazolamide to reduce endolymph volume and
    pressure, decreasing the frequency of vertigo attacks. Used as part of
    first-line conservative management.
  treatment_term:
    preferred_term: pharmacotherapy
    term:
      id: MAXO:0000058
      label: pharmacotherapy
  evidence:
  - reference: PMID:15090872
    supports: SUPPORT
    snippet: "Initial management of Ménière's disease can involve a low-salt diet and a diuretic."
    explanation: "Establishes diuretics as component of initial management strategy"

- name: Betahistine
  description: >
    Histamine analog that improves inner ear blood flow and reduces
    vestibular symptoms. Widely used outside North America as part of
    conservative medical management.
  treatment_term:
    preferred_term: pharmacotherapy
    term:
      id: MAXO:0000058
      label: pharmacotherapy
    therapeutic_agent:
    - preferred_term: betahistine
      term:
        id: CHEBI:35677
        label: betahistine
  evidence:
  - reference: PMID:11465871
    supports: SUPPORT
    snippet: "The very common use in Europe of histaminergic agents."
    explanation: "Documents histaminergic agent (betahistine) use as standard therapy in Europe"

- name: Intratympanic Injections
  description: >
    Injection of corticosteroids or gentamicin through the tympanic membrane
    to reduce vertigo. Gentamicin reduces vestibular function; corticosteroids
    provide nonablative alternative. Used when medical management fails.
  treatment_term:
    preferred_term: pharmacotherapy
    term:
      id: MAXO:0000058
      label: pharmacotherapy
  evidence:
  - reference: PMID:15090872
    supports: SUPPORT
    snippet: "Treatment with intratympanic injection of gentamicin can be beneficial when vertigo persists despite optimal medical management."
    explanation: "Establishes intratympanic gentamicin as second-line therapy for refractory vertigo"
  - reference: PMID:12590850
    supports: SUPPORT
    snippet: "Transtympanic injection, as a quick, easy, well-tolerated, ambulatory and cost-effective technique."
    explanation: "Confirms intratympanic approach as practical, well-tolerated treatment modality"

- name: Vestibular Rehabilitation
  description: >
    Physical therapy exercises to improve balance and reduce dizziness by
    promoting central compensation for vestibular dysfunction. Complements
    medical and surgical interventions.
  treatment_term:
    preferred_term: physical therapy
    term:
      id: MAXO:0000011
      label: physical therapy

- name: Endolymphatic Sac Surgery
  description: >
    Surgical decompression of the endolymphatic sac to improve endolymph
    drainage and reduce hydrops. Nonablative surgical alternative used when
    conservative measures and intratympanic therapies fail.
  treatment_term:
    preferred_term: surgical procedure
    term:
      id: MAXO:0000004
      label: surgical procedure
datasets: