title: Gossypiboma of the leg: MR imaging characteristics. A case report.
abstract: We report a 22-year-old man with a solid mass in the right proximal leg, which was furned out to be a gossypiboma. MR imaging revealed a well-defined mass lesion that showed intermediate signal intensity at T1-weighted imaging (T1WI) and slightly high signal intensity at T2-weighted imaging (T2WI). Wavy, low-signal-intensity stripes were visible within the fluid-filled central cavity. At surgical exploration, a sponge, retained after previous knee surgery, was discovered, and it was found that a granuloma had developed. Pathologic examination revealed granulomatous inflammation, with lymphocyte and giant cell infiltration. The presence of wavy, low-signal-intensity gauze fibers at T2WI may be a characteristic MR appearance of gossypiboma.
authors.affiliation: Department of Radiology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan. rain2343@ms22.hinet.net
authors.forename: Chung Ping
authors.initials: CP
authors.lastname: Lo
authors.forename: Chia Chun
authors.initials: CC
authors.lastname: Hsu
authors.forename: Tsun Hou
authors.initials: TH
authors.lastname: Chang
mesh_terms: D000328:Adult; D005547:Foreign Bodies / Q000175:diagnosis* / Q000601:surgery; D015745:Granuloma, Foreign-Body / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D007866:Leg; D008279:Magnetic Resonance Imaging; D008297:Male; D015503:Surgical Sponges