Massive Subcutaneous Hemangiosarcoma in a Dog

Abstract

In an 8-year-old male Rough Collie, a persistant swelling had been first recognized in the front part of the right shoulder about 15 months before death. The affected part quickly enlarged during two months before the animal was sacrificed. At necropsy a neoplasm, 22×17×14cm in size, was found under the clavicular muscle. It was diagnosed microscopically was hemangiosarcoma. The tumor was accompanied by extensive necrosis, multiple thrombi and severe hemorrhage. No metastasis as detected in any of the other organs or tissues examined.