The Reversed Question Mark Sign and the Dragon Sign of Ulcerative Colitis

Akira Hokama, Shuichi Maruwaka, Kunikazu Hoshino, Kazuto Kishimoto, Fukunori Kinjo, Jiro Fujita

Abstract


In gastroenterology, a sign is usually a marker or indicator of the presence of a particular disease and many signs are related to findings on clinical examination. In relation to ulcerative colitis (UC), only a few signs have been described that may assist with the interpretation of imaging studies. The well-known sign of UC is tubular appearance. We highlight other radiological findings in UC that we have called “the reversed question mark sign” and “the dragon sign”.

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