Primary abdominal wall clear cell carcinoma: case report and review of literature.

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. CASE REPORT 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. CONCLUSION 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.