title: Primary abdominal wall clear cell carcinoma: case report and review of literature.
abstract: BACKGROUND
  The development of a mass in a surgical scar poses a diagnostic dilemma due to similarities in appearance to hernias, abscesses, hematomas or desmoid tumors. Scar endometriosis is uncommon and malignant change within this ectopic tissue is rare.
  
  
  METHODS
  The case of a 55-year-old woman with an isolated clear cell adenocarcinoma in an area of scar endometriosis more than 17 years after a cesarean section is presented. Initially, this tumor was thought to be a chronic abscess, but was finally diagnosed as clear cell carcinoma. This case highlights the difficulties in preoperative diagnosis as well as the poor prognosis of these tumors.
  
  
  CONCLUSIONS
  Accurate diagnosis of a lump within a scar is important to define the prognosis and treatment. Further data are needed for the management of this pathology.
authors.affiliation: CHUM, Hôpital Notre-Dame, Gynecologic Oncology Service, 1560 Sherbrooke Est, Montreal QC, H2K 4E9, Canada. drcarolewilliams@gmail.com
authors.forename: Carole
authors.initials: C
authors.lastname: Williams
authors.forename: Patrick
authors.initials: P
authors.lastname: Petignat
authors.forename: Annie
authors.initials: A
authors.lastname: Belisle
authors.forename: Pierre
authors.initials: P
authors.lastname: Drouin
mesh_terms: D000008:Abdominal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D000230:Adenocarcinoma / Q000175:diagnosis* / Q000601:surgery; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D008875:Middle Aged