title: Plain film recognition of giant colonic diverticulum.
abstract: Four cases of giant colonic diverticula are presented with emphasis on plain film recognition employing the "balloon sign", a persistent, rounded lucency which is consistently seen on any abdominal scout film or survey. The importance of this finding is even greater in the absence of gastrointestinal complaints in view of the complication of torsion and perforation.
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D004241:Diverticulum, Colon / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011859:Radiography; D012810:Sigmoid Diseases / Q000000981:diagnostic imaging