Is ureteral endometriosis an asymmetric disease?

Paolo Vercellini, P Vercellini, Anna Pisacreta, A Pisacreta, Antonella Pesole, A Pesole, Sarah Vicentini, S Vicentini, Giovanna Stellato, G Stellato, Pier Giorgio Crosignani, P G Crosignani
BJOG: An International Journal of Obstetrics & Gynaecology · 2000 · vol. 107(4) , pp. 559–561 · doi:10.1111/j.1471-0528.2000.tb13279.x · PMID:10759279 · W1976041574
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⚙ AI-generated summary by claude@2026-06, 2026-06-09 ⓘ

Ureteral endometriosis predominantly affects the left ureter, with 64% of unilateral cases occurring on the left, differing significantly from a 50% expected distribution.

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Abstract

Six cases of endometriosis obstructing the left ureter were observed among 1,054 consecutive patients undergoing surgery in an eight-year period. In addition, 125 women with ureteral endometriosis (left-sided, n = 66; right-sided, n = 40; bilateral, n = 19) were described in 62 articles identified in a systematic review of the English language literature between 1980 and 1998. Considering only the patients with unilateral ureteral endometriosis and combining the published figures with those of our surgical series, the observed proportion of left lesions (72/112, 64%; 95% CI 55% to 73%) was significantly different from the expected proportion of 50% (chi2(1), 9.14, P = 0.002). The lateral asymmetry found in the location of ureteral endometriosis is compatible with the menstrual reflux theory and with the anatomical differences of the left and right hemipelvis.

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Condition tags

mesh:D004715endometriosis

MeSH descriptors

Endometriosis Ureter Ureteral Diseases Adult Aged Endometriosis Female Humans Middle Aged Retrospective Studies Ureter Ureteral Diseases Ureteral Obstruction Ureteral Obstruction Ureteral Obstruction

Citation neighborhood

Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. [ expand to 2 hops ] — adds papers reached through this work's immediate citers/citees. Heavier; up to 60 extra dots.

References (7)

Cited by (50)

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