title: The ring sign.
authors.affiliation: Department of Abdominal Imaging, Indiana University Hospitals, Indianapolis, Ind, USA. arajesh27@hotmail.com
authors.forename: Arumugam
authors.initials: A
authors.lastname: Rajesh
mesh_terms: 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