title: Linear niches in the duodenal bulb.
abstract: Twenty-three linear niches in the duodenal bulb were found in 22 patients out of a series of 314 patients with radiographically demonstrated duodenal ulcers (incidence 7%). Double-contrast and single-contrast graded-compression views were effective in depicting the linear niche in four cases. In 14 cases only double-contrast films showed the abnormality, while in four cases the diagnosis could be made only on positive-contrast graded-compression films. Optimal distension proved to be essential in both techniques. All niches were transversely oriented in the duodenal bulb. In 18 cases the niche occurred in a deformed bulb, and in four cases there was no deformity. Radiologic differentiation between a thin, active, linear ulcer and a linear scar was not possible.
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D004378:Duodenal Diseases / Q000150:complications / Q000000981:diagnostic imaging*; D004381:Duodenal Ulcer / Q000150:complications / Q000000981:diagnostic imaging; D004386:Duodenum / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography
chemical_list: D003287:Contrast Media