The ring sign.
Rajesh
Arumugam
A
Department of Abdominal Imaging, Indiana University Hospitals, Indianapolis, Ind, USA. arajesh27@hotmail.com
D000273:Adipose Tissue / Q000000981:diagnostic imaging; D012809:Colon, Sigmoid / Q000000981:diagnostic imaging*; D006801:Humans; D012810:Sigmoid Diseases / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed