The rectosigmoid index.
Case material was reviewed to determine the value of the rectosigmoid index in the diagnosis of both segmental and total-colon aganglionosis in infants less than one month old. Data indicate that a rectosigmoid index higher than 0.9 may rule out a diagnosis of rectosigmoid aganglionosis but may be a misleading indicator of longer segment or total-colon aganglionosis.
D012809:Colon, Sigmoid / Q000000981:diagnostic imaging*; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000000981:diagnostic imaging; D008531:Megacolon / Q000000981:diagnostic imaging*; D011859:Radiography; D012007:Rectum / Q000000981:diagnostic imaging*