title: [Left lateral predisposition of endometrioma].
abstract: OBJECTIVE
  To investigate whether asymmetry exists in the left- and right-handed distribution of ovarian cystic lesions in women with endometriosis.
  
  
  METHODS
  We evaluate operative reports of women who underwent first line surgical treatment of endometrioma (n=154) from January 2000 to December 2002. Data of all operative findings consisted of a written report, and a diagram, the revised American Fertility Society classification of endometriosis.
  
  
  RESULTS
  Endometrioma was found in the left ovary (n=81), in the right ovary (n=39), and bilaterally (n=34). Left ovarian endometrioma was found more frequently (67,5%) than the right endometrioma (P<.001, odds ratio 2.3, 95% confidence interval 1.5, 3.7). This trend was not related to the size of the endometrioma.
  
  
  CONCLUSIONS
  Our results confirm a left lateral predisposition of ovarian endometrioma. It is probably caused by the decreased fluid movement in the left side of the pelvis because of the presence of sigmoid colon. These findings may support the theory that the origin of endometriosis is from the regurgitated endometrial cells.
authors.affiliation: Klinika Ginekologii AM w Gdańsku.
authors.forename: Jacek
authors.initials: J
authors.lastname: Sznurkowski
authors.forename: Janusz
authors.initials: J
authors.lastname: Emerich
mesh_terms: D000328:Adult; D016001:Confidence Intervals; D004715:Endometriosis / Q000473:pathology* / Q000601:surgery; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008875:Middle Aged; D016017:Odds Ratio; D010048:Ovarian Cysts / Q000473:pathology* / Q000601:surgery; D012189:Retrospective Studies