title: Intraocular osteosarcoma in an Umbrella Cockatoo (Cacatua alba).
abstract: An adult, presumed intact female Umbrella Cockatoo (Cacatua alba), presented with acute hemorrhage from an intraocular mass that perforated through the right cornea. Computed tomography scanning revealed a large soft tissue mass in the right orbit, invading and displacing the globe laterally, and destroying the scleral ossicles. There was no evidence of bony changes of the orbit or extension of the mass into the optic nerve or brain. Exenteration and mass removal were performed, and osteosarcoma was diagnosed via histopathology. Radiotherapy was delivered with an orthovoltage unit to a total dose of 68 Gray delivered in 17 fractions over 6 weeks. The bird recovered well from treatment, but died 2 months after the last radiation session with neurological signs. Necropsy was not performed. To our knowledge, this is the first case of an intraocular osteosarcoma reported in a bird, and the first case of attempted treatment of osteosarcoma in a bird by a combination of surgery and radiation therapy.
authors.affiliation: Section of Special Species Medicine and Surgery, Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA 19104-6051, USA. fordhamm@vet.upenn.edu
authors.forename: Margaret
authors.initials: M
authors.lastname: Fordham
authors.forename: Karen
authors.initials: K
authors.lastname: Rosenthal
authors.forename: Amy
authors.initials: A
authors.lastname: Durham
authors.forename: Lili
authors.initials: L
authors.lastname: Duda
authors.forename: András M
authors.initials: AM
authors.lastname: Komáromy
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000473:pathology* / Q000532:radiotherapy / Q000601:surgery; D046410:Cockatoos; D005134:Eye Neoplasms / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery / Q000662:veterinary*; D005260:Female; D012516:Osteosarcoma / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery / Q000662:veterinary*