title: Colonic lymphoid nodules: another cause of the red ring sign.
authors.forename: M B
authors.initials: MB
authors.lastname: Smith
authors.forename: M O
authors.initials: MO
authors.lastname: Blackstone
mesh_terms: D000368:Aged; D003106:Colon / Q000033:anatomy & histology*; D003113:Colonoscopy; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000033:anatomy & histology; D008221:Lymphoid Tissue / Q000033:anatomy & histology*