title: Deeply infiltrating endometriosis affecting the rectum and lymph nodes.
abstract: OBJECTIVE
  To analyze morphologic aspects of bowel endometriosis.
  
  
  METHODS
  Prospective study of 35 consecutive cases of bowel endometriosis.
  
  
  METHODS
  Multidisciplinary group practice and teaching hospital.
  
  
  METHODS
  Thirty-five patients with bowel endometriosis were assessed between September 2003 and June 2005.
  
  
  METHODS
  Histologic analysis of 35 tissue samples removed at laparoscopic rectosigmoidectomy.
  
  
  METHODS
  We performed an evaluation of lesion size, number of lesions present in the bowel, intestinal wall layers affected by the endometriotic lesion, circumference of the intestinal loop affected by the endometriotic lesion, and presence of lymph nodes with foci of endometriosis.
  
  
  RESULTS
  Analysis of the surgical samples revealed lymph nodes in the pericolic adipose tissue of 19 (54%), cases and in 5 of these cases (26.3%), endometriosis had affected the lymph nodes. When the thickness of the endometriotic lesion reached 1.75 cm, lymph nodes of all patients were affected, and all patients in whom more than 80% of the circumference of the intestinal loop was affected by endometriosis presented with positive lymph nodes.
  
  
  CONCLUSIONS
  This study raises doubts about whether this form of the disease can still be considered a clinically benign disease.
authors.affiliation: Obstetrics and Gynecology Department, Hospital das Clínicas, São Paulo Medical School, São Paulo, Brazil. msabrao@attglobal.net
authors.forename: Mauricio S
authors.initials: MS
authors.lastname: Abrao
authors.forename: Sergio
authors.initials: S
authors.lastname: Podgaec
authors.forename: Joao Antonio
authors.initials: JA
authors.lastname: Dias
authors.forename: Marcelo
authors.initials: M
authors.lastname: Averbach
authors.forename: Ray
authors.initials: R
authors.lastname: Garry
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Ferraz Silva
authors.forename: Filomena M
authors.initials: FM
authors.lastname: Carvalho
mesh_terms: D000328:Adult; D004715:Endometriosis / Q000473:pathology*; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008206:Lymphatic Diseases / Q000473:pathology*; D008875:Middle Aged; D012002:Rectal Diseases / Q000473:pathology*; D012007:Rectum / Q000473:pathology*