title: Surgical treatment of endometriosis: location and patterns of disease at reoperation.
abstract: OBJECTIVE
  To assess the behavior of revised American Fertility Society stages I and II endometriosis after surgical treatment, by observation of location of pelvic involvement at reoperation.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Tertiary referral center at a university-based hospital.
  
  
  METHODS
  Thirty-nine women with persistent or recurrent chronic pelvic pain after laparoscopic excision or ablation of histologically confirmed endometriosis who underwent a second laparoscopy.
  
  
  METHODS
  Laparoscopic pelvic mapping and surgical treatment of endometriosis, followed by repeat laparoscopic pelvic mapping of endometriosis at a second laparoscopy.
  
  
  RESULTS
  Superficial peritoneal endometriosis (revised American Fertility Society stage I-II) endometriosis recurred in 37% of pelvic regions after surgical treatment. Endometriosis was more likely to recur in a treated pelvic region than an adjacent or distant pelvic region (relative risk 2.54; 95% confidence interval 1.63-3.97). A region adjacent to a previously affected pelvic region that was unaffected by endometriosis at the initial laparoscopy was more likely to have endometriosis at the second laparoscopy than a pelvic region distant from the treated pelvic region (relative risk 1.29; 95% confidence interval 0.84-2.0). Unaffected regions at initial laparoscopy had a low probability of having new endometriosis (11%) in the second laparoscopy.
  
  
  CONCLUSIONS
  Recurrence of histologically proven endometriosis after surgical excision is more likely to cluster close to the original area of involvement, reflecting either incomplete excision at the initial surgery or a nonrandom favored implantation of new endometrial implants in adjacent peritoneum. Further studies are needed to elucidate the pathophysiology and mechanisms of recurrence of endometriosis.
authors.affiliation: Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, British Columbia Women's Hospital and Health Care Centre, Vancouver, British Columbia, Canada.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Taylor
authors.forename: Christina
authors.initials: C
authors.lastname: Williams
mesh_terms: D000293:Adolescent; D000328:Adult; D002908:Chronic Disease; D004715:Endometriosis / Q000150:complications / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D010535:Laparoscopy; D008875:Middle Aged; D010147:Pain Measurement; D017699:Pelvic Pain / Q000209:etiology / Q000601:surgery*; D010532:Peritoneal Diseases / Q000150:complications / Q000473:pathology / Q000601:surgery*; D011446:Prospective Studies; D012008:Recurrence; D012086:Reoperation; D018570:Risk Assessment; D012307:Risk Factors; D012720:Severity of Illness Index; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult