Gingival Hemangiosarcoma of the Left Mandible in a Dog

A ten year old Dogo Argentino cross, was presented with a fast growing mass in the left mandible. The dog underwent hemimandibulectomy and cheiloplasty. No chemotherapeutic regimes were administered, post-operatively. The histopathological findings were suggestive of hemangiosarcoma. The animal survived with no signs of metastasis or recurrence for 5 months, when local recurrence was identified and radiographic examination revealed lung metastasis. Consequently, the owner decided to euthanize the dog. Mandibular hemangiosarcoma is aggressive both locally and systemically as it recurred and metastasized, even after extensive excision. To the authors knowledge this is a rare case of mandibular hemangiosarcoma reported in the dog.