title: A "crescent-in-doughnut" lesion at right lower quadrant abdomen.
authors.affiliation: Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei, Taiwan.
authors.forename: Chen-Shuan
authors.initials: CS
authors.lastname: Chung
authors.forename: Ming-Yang
authors.initials: MY
authors.lastname: Wang
authors.forename: Hsiu-Po
authors.initials: HP
authors.lastname: Wang
mesh_terms: D003082:Colectomy; D003113:Colonoscopy; D005336:Fiber Optic Technology; D006801:Humans; D007077:Ileal Diseases / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D007078:Ileal Neoplasms / Q000150:complications / Q000473:pathology* / Q000601:surgery; D007443:Intussusception / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D008067:Lipoma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography