title: Extraskeletal osteochondroma on a cat´s elbow.
abstract: A solitary extraskeletal osteochondroma was diagnosed in a 6-year-old, castrated male  Burmese cat, positive for feline leukaemia virus (FeLV). The cat presented with a rapidly  growing, solid, non-painful mass on the craniolateral aspect of the left elbow. Radiographs  revealed an oval, well circumscribed 2.0 cm × 1.5 cm × 1.5 cm mineralised mass separated  from the underlying bone. Surgical excisional biopsy confirmed the diagnosis. Feline  extraskeletal osteochondromas are benign tumours frequently seen in FeLV-positive cats  which can transform into osteosarcomas or chondrosarcomas. Radiographically, they cannot  be distinguished from a parosteal or an extraskeletal osteosarcoma.
authors: Department of Companion Animal Clinical Studies, University of Pretoria, South Africa. chantal.rosa@up.ac.za
authors: Chantal
authors: C
authors: Rosa
authors: Robert M
authors: RM
authors: Kirberger
mesh_terms: D000818:Animals; D002415:Cats; D005552:Forelimb / Q000473:pathology* / Q000601:surgery; D007596:Joints / Q000473:pathology* / Q000601:surgery; D008297:Male; D015831:Osteochondroma / Q000473:pathology / Q000601:surgery / Q000662:veterinary*