Intravascular Tumour in a Dog Causing Skin Ulcerative Lesions

A case study of an unusual presentation of an intravascular angiosarcoma in a dog, presenting clinically as multifocal ulcerated skin plaque‐like lesions on the right pelvic limb and right lateral flank. It illustrates the challenging identification of neoplastic proliferations with atypical presentation and highlights the importance of immunohistochemical examinations in achieving a diagnosis. Furthermore, this case shows the need for deep skin biopsies in areas of ulceration and necrosis, as the vascular lesions causing them might be only, or mainly, located in the subcutis.