title: Case report 775. Canine osteosarcoma with associated avascular necrosis and sequestrum formation.
abstract: A young dog was found to have an osteosarcoma of the proximal femur containing a radiologically evident sequestrum of dead bone. Although the tumor was extensive, the plain films were most remarkable for the presence of a sequestrum. MR scans revealed the extent of the lesion, with low signal throughout the lesion consistent with the heavily calcified tumor and central avascular bone. At the 1-year follow-up, lung metastases had developed, but the dog appeared well.
authors.affiliation: Department of Radiology, University of Wisconsin Hospital, Madison 53792.
authors.forename: A A
authors.initials: AA
authors.lastname: De Smet
authors.forename: R T
authors.initials: RT
authors.lastname: Dueland
authors.forename: R R
authors.initials: RR
authors.lastname: Dubielzig
mesh_terms: D000818:Animals; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D004283:Dog Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D004285:Dogs; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000662:veterinary; D010020:Osteonecrosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D012516:Osteosarcoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D011859:Radiography