CT findings in peripheral T-cell lymphoma involving the gastrointestinal tract

PURPOSE: To evaluate whether computed tomography (CT) accurately depicted gastrointestinal tract involvement in peripheral T-cell lymphoma (PTCL). MATERIALS AND METHODS: CT scans were retrospectively reviewed in 14 patients with pathologically proved PTCLs of the gastrointestinal tract for the following considerations: sites, patterns of involvement (ie, morphologic features, bowel wall thickness or mass size, and contrast enhancement pattern), and ancillary findings at other sites (ie, lymphadenopathy, bowel perforation, and involvement of other organs). RESULTS: PTCL involved the stomach in three patients, the small intestine in eight, both the stomach and the small intestine in one, and the sigmoid colon in two; multifocal involvement was seen in three (21%) patients. CT failed to demonstrate the bowel lesions in three of 14 patients. At CT, 11 patients had gastric or bowel wall thickening (n = 10) and a polypoid mass (n = 1). In 10 patients, the gastric or bowel wall thickening was mild (<1 cm) in six, moderate (1-2 cm) in three, and severe (>2 cm) in one. Lymphadenopathy was noted in nine (64%) patients, with the nonbulky type in eight and the bulky type in one. Bowel perforation occurred in four (29%) patients. Other organs were involved in eight (57%) patients. CONCLUSION: CT can depict PTCL involving the gastrointestinal tract if it is not confined to the mucosa. There is a tendency toward preferential jejunal or duodenal involvement, as well as bowel perforation. (C) RSNA, 2003.