| Tumor type | Typical location | Size range / numeric examples | Typical presentation | Diagnostic pitfalls | Pathology highlights | Management / outcomes | Rarity / epidemiology | Key citations |
|---|---|---|---|---|---|---|---|---|
| Papilloma of the fallopian tube | Not well quantified in available evidence; intratubal lesion capable of causing luminal obstruction | No reliable size series found in available context | Often incidental; may present through tubal obstruction with hydrosalpinx or infertility | Can overlap conceptually with papillary tubal hyperplasia; distinction from diffuse papillary tubal hyperplasia and from borderline/malignant papillary tubal lesions is important | Rare benign epithelial neoplasm composed of branching papillary cores lined by bland, non-ciliated, non-metaplastic epithelium; may represent a localized mass-forming variant of papillary tubal hyperplasia | No tumor-specific modern management series identified in available context; treatment is generally surgical when symptomatic/obstructive | Described as rare; no incidence or case-count estimate found in available context | (pqac-00000007, pqac-00000015) |
| Serous adenofibroma / cystadenofibroma (including papillary cystadenofibroma) | Most often fimbrial end; may arise from intraluminal or serosal surface near the fimbria; small fimbrial lesions also reported in high-risk surgical series | Commonly small, often 1–7 mm in incidental fimbrial lesions; reported larger examples include 0.3×0.2 cm, 2 cm, 3.5 cm, 2.5×2×2 cm, 5×4 cm, 5×6 cm, 5×6×7 cm, and a giant cystic case 10.4×7.87×6.7 cm | Usually asymptomatic and incidental; abdominal/pelvic pain, palpable mass, posterior fornix cyst, vaginal bleeding, urinary or bowel complaints; can mimic ectopic pregnancy or acute abdomen | Frequently mistaken for ectopic pregnancy, appendicitis, adnexal malignancy, tubal carcinoma, or borderline serous tumor; preoperative diagnosis is rare and imaging can look malignant | Benign biphasic Müllerian-type lesion with papillary folds/excrescences and dense fibrous stroma; lining by low cuboidal to tall columnar/ciliated epithelium without atypia, mitoses, or invasion; reported vimentin-cytokeratin coexpression and diffuse apical EMA; focal ovarian stroma in some cases supports heterotopic/extraovarian sex-cord stromal proliferation hypothesis | Conservative surgery favored when feasible: cystectomy, fimbrial cystectomy, salpingectomy, or unilateral salpingo-oophorectomy depending on anatomy and suspicion; reported benign course, no recurrence at 12 months in several case reports; hormone normalization after excision reported in one 2023 case | Extremely rare: literature summaries report 15 reported cases worldwide, only 5 English-language cases in one review, and 18 worldwide cases in another review; incidental adenofibroma found in 2.2% of non-tumoral tubes in one pathology series; fimbrial adenofibromas reported in 9.9% in one high-risk series | (pqac-00000003, pqac-00000004, pqac-00000005, pqac-00000016, pqac-00000024, pqac-00000026, pqac-00000030) |
| Leiomyoma of the fallopian tube | Often isthmic and more often left-sided in available reviews; may also occur in ampulla; arises from tubal smooth muscle or vascular smooth muscle | Usually small; examples include 3×3 cm at left isthmus, 3.8 cm on US, 4.0×2.5 cm on PET/CT, 4.7×4.0×2.7 cm on MRI; larger masses with degeneration/torsion also reported in literature reviews | Often asymptomatic/incidental; pelvic or abdominal pain, adnexal mass, torsion, degenerative change, ectopic pregnancy, delayed menses, and infertility are reported | Often misidentified as uterine leiomyoma, ovarian/adnexal mass, or other benign tubal tumors; imaging overlap is substantial and diagnostic laparoscopy may be needed | Benign smooth-muscle tumor with spindle cells, collagen/fibrovascular stroma, actin positivity; MRI may resemble uterine leiomyoma (isointense T1, hypointense T2 when non-degenerated) but myxoid degeneration can produce heterogeneous T2 hyperintensity and enhancement | Surgical excision is standard; salpingectomy for those without fertility goals, fertility-preserving myomectomy/laparoscopic resection for those desiring fertility; one case preserved tubal integrity with bilateral tubal patency on HyCoSy at 15 months; no abnormality on US at 6 months in another case | Extremely rare; incidence unknown because of small numbers; one imaging review states ~84 cases reported to date, while later literature notes <100 cases reported; typical age mostly 25–45 years, highest reported age 70 | (pqac-00000010, pqac-00000012, pqac-00000013, pqac-00000014, pqac-00000029) |


*Table: This table summarizes the main benign fallopian tube tumor types discussed in the literature, including their usual location, presentation, pathology, diagnostic pitfalls, rarity, and management. It is useful as a compact knowledge-base artifact because evidence is sparse and largely derived from case reports and small series.*