Synovial cell sarcoma in a sulphur‐crested cockatoo (Cacatua galerita)

Abstract

A 13-year-old sulphur-crested cockatoo (Cacatua galerita) was presented with a mass surrounding the right elbow joint. Radiographs showed a soft tissue mass. The right wing was amputated. Histological examination of the mass revealed an incompletely lobulated tumour composed of strands of spindle-shaped cells and of epithelial cells resembling acini. On morphological grounds the tumour was classified to be a synovial cell sarcoma. After 6 months the bird was returned for examination because of lameness in the right leg. Radiographs showed osteolysis in the right tibiotarsal bone. Cytological investigation of a bone marrow biopsy revealed neoplasia. The bird was euthanized. Necropsy revealed metastases in many organs. This is believed to be the first reported case of synovial cell sarcoma in a bird.

Synovial cell sarcoma in a captive maned wolf (Chrysocyon brachyurus)

“…SYNOVIAL cell sarcomas (SCS) are malignant mesenchymal tumours arising from synoviocytes (Pool and Thompson 2002). They are rare tumours in animals, but are most frequently reported in dogs (Whitelock and others 1997, Fox and others 2002), and occasionally in cats (Liptak and others 2004), horses (Edens and others 2001), cattle (Pool and Thompson 2002), ferrets (Lloyd and Wood 1996) and psittacines (Van Der Horst and others 1996, Agren and others 2001). Maned wolves ( Chrysocyon brachyurus ) are the largest of the South American canids.…”

Infiltrative Myxoma of the Stifle Joint and Thigh in a Domestic Rabbit (Oryctolagus cuniculus)

“…Synovial tumours have been described in man and dogs, in addition to cattle, cats, ferrets and birds (Lloyd and Wood, 1996;Van Der Horst et al, 1996;Craig et al, 2002;Liptak et al, 2004;Oyamada et al, 2004). In dogs, these tumours occur typically in large joints and tendon sheaths of the extremities, most commonly the stifle joint (Thompson and Pool, 2002).…”