Is ureteral endometriosis an asymmetric disease?

Paolo Vercellini, Anna Pisacreta, Antonella Pesole, Sarah Vicentini, Giovanna Stellato, Pier Giorgio Crosignani

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Six cases of endometriosis obstructing the left ureter were observed among 1054 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% (χ 2 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.

Original languageEnglish
Pages (from-to)559-561
Number of pages3
JournalBritish Journal of Obstetrics and Gynaecology
Issue number4
Publication statusPublished - 2000


ASJC Scopus subject areas

  • Obstetrics and Gynaecology

Cite this

Vercellini, P., Pisacreta, A., Pesole, A., Vicentini, S., Stellato, G., & Giorgio Crosignani, P. (2000). Is ureteral endometriosis an asymmetric disease? British Journal of Obstetrics and Gynaecology, 107(4), 559-561.