[Abdominal wall abscess as the presenting sign in carcinoma of the colon: report of 4 cases]. / Abcès pariétal abdominal révélateur de néoplasie colique: présentation de 4 cas.

PURPOSE: We report four cases of unusual presentation of colonic cancer revealed by an abscess of the abdominal wall. MATERIALS AND METHODS: Our study included 3 men and 1 women ranging in age from 33 to 66 years presenting with abdominal wall abscess (in the left anterior abdominal wall in 2 patients and in the quadratus lumborum muscle in the other 2 patients). Our cases were listed from the departments of radiology and abdominal surgery of Sahloul hospital from 1995 through 2000. Ultrasonography (US) and computed tomography (CT) were performed in all cases; barium enema in three. RESULTS: US and CT revealed segmental colonic wall thickening (left colon in three patients and right colon in one patient). The diagnosis of colonic cancer was reached by colonoscopy with biopsy in all 4 cases. All of our patients underwent surgical treatment. CONCLUSION: In this era of newer diagnostic imaging modalities, US and CT must frequently be used in the evaluation of patients with abdominal wall abscess, to depict intra-abdominal infection and especially malignant lesion causing abdominal wall abscess.