Fig. 6

Differentiation of gastric tumours from PUD. In a 45-year-old HIV-positive male with wasting syndrome, CT (a) with oral water (+) showed localized, enhancing mural thickening at distal gastric antrum (thin arrows). In a 67-year-old male, CT (b…d) revealed distended gastric fundus (+) with residual contrast from previous fluoroscopic study, contracted antrum with mucosal enhancement (thin arrows) and hypoattenuating mural thickening (*); multiplanar image review revealed shouldering at transition between abnormal wall and upstream gastric body (in c) and eccentric, nodular-shaped thickening (in d) with subtle infiltration of perigastric fat, consistent with endoscopic diagnosis of stomach cancer. In a 44-year-old female, diffuse signet-ring gastric carcinoma (linitis plastica) showed CT (e, f) appearance of asymmetrically thickened, hypoattenuating wall (*) with irregular, enhancing mucosal thickening (thin arrows) and a focal posterior ulceration (arrow in e)