title: Colonoscopic red ring sign due to chronic lymphocytic leukemia.
authors.affiliation: Division of Gastroenterology, Mayo Clinic Jacksonville, FL 32224, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Stark
authors.forename: W J
authors.initials: WJ
authors.lastname: Maples
authors.forename: J T
authors.initials: JT
authors.lastname: Wolfe
authors.forename: D M
authors.initials: DM
authors.lastname: Menke
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D012809:Colon, Sigmoid / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology*; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000150:complications / Q000473:pathology* / Q000628:therapy; D008297:Male; D012810:Sigmoid Diseases / Q000150:complications / Q000473:pathology* / Q000628:therapy; D012812:Sigmoidoscopy