Pseudotumor of the sigmoid mimicking carcinoma.
On colonoscopy, the macroscopic aspect of a lesion is an important criterion for the differential diagnosis. We present a case of an apparently malignant tumor in the sigmoid. Histological investigation failed to support the diagnosis made from the gross appearance seen on colonoscopy. After surgical resection, the lesion turned out to be a reactive pseudotumor caused by fibroepithelial hyperplasia related to a severe diverticulitis with perforation of the intestinal wall.
Rosenbaum
A
A
Dept. of Gastroenterology, Hepatology and Diabetology, Klinikum der Stadt Ludwigshafen, Germany. MedCLu@t-online.de
Arnold
J C
JC
Rebel
M
M
Riemann
J F
JF
D000368:Aged; D012809:Colon, Sigmoid / Q000473:pathology; D003113:Colonoscopy; D003937:Diagnosis, Differential; D004239:Diverticulitis, Colonic / Q000175:diagnosis* / Q000473:pathology; D004848:Epithelium / Q000473:pathology; D006104:Granuloma, Plasma Cell / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D006965:Hyperplasia; D007416:Intestinal Perforation / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D012810:Sigmoid Diseases / Q000175:diagnosis* / Q000473:pathology; D012811:Sigmoid Neoplasms / Q000175:diagnosis* / Q000473:pathology