A chondroblastic osteosarcoma of the coronoid process mimicking a fragmented coronoid process in a dog.
A 6-year-old Rhodesian Ridgeback was presented with a 1.5 year history of right forelimb lameness. Clinical, radiological and computed tomographic findings suggested the presence of fragmented medial coronoid process. A subtotal coronoidectomy was performed and, due to the atypical appearance of the medial coronoid process on imaging and at surgery, histopathology of the fragments was performed which revealed chondroblastic OS. Ten months after surgery, the dog was re-presented with the same clinical signs and the radiographic changes were suggestive of a recurrence of the OS. Palliative therapy was instigated at the owner's request. Thirty months after surgery of the neoplasm, the dog was presented with dyspnea. Thoracic radiographs showed lesions consistent with lung metastases. Euthanasia was requested by the owner, who declined post-mortem examination.
Department of Veterinary Medical Imaging and Small Animal Orthopaedics, Faculty of Veterinary Medicine, Ghent University, Salisburylane 133, 9820, Merelbeke, Belgium. lieve.de.rycke@skynet.be.
Lieve Marie Joseph
LM
De Rycke
Veterinair Orthopedisch Centrum Tilburg, Koningsoordlaan 2, 5056 DA, Berkel-Enschot, The Netherlands.
Wilhelmus Sebastianus Johannes
WS
Rasenberg
Pathology Division, Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3508 TD, Utrecht, The Netherlands.
Koen
K
Cirkel
Department of Veterinary Medical Imaging and Small Animal Orthopaedics, Faculty of Veterinary Medicine, Ghent University, Salisburylane 133, 9820, Merelbeke, Belgium.
Henri Jacques Johan
HJ
van Bree
Department of Veterinary Medical Imaging and Small Animal Orthopaedics, Faculty of Veterinary Medicine, Ghent University, Salisburylane 133, 9820, Merelbeke, Belgium.
Ingrid Maria
IM
Gielen
D000818:Animals; D001859:Bone Neoplasms / Q000175:diagnosis / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D004283:Dog Diseases / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D004285:Dogs; D017809:Fatal Outcome; D005260:Female; D007794:Lameness, Animal / Q000209:etiology / Q000601:surgery; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D012516:Osteosarcoma / Q000175:diagnosis / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D014057:Tomography, X-Ray Computed / Q000662:veterinary; D014457:Ulna / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery
Chondroblastic osteosarcoma; Computed tomography; Dog; Medial coronoid process; Ulna