Cutaneous perivascular wall tumor in a geriatric mixed-breed dog

DOI: 10.5281/zenodo.23054034

Abstract

Perivascular wall tumor (PWT) is a type of soft tissue sarcoma that arises from vascular non-endothelial mural cells. It is generally considered a less aggressive and locally invasive tumor, with metastatic spread occurring only rarely. This case involved a 13-year-old female Golden Retriever-Labrador Retriever mixed-breed dog that presented to the Veterinary Surgery and Radiology Laboratory, Faculty of Veterinary Medicine, Udayana University, with a mass located on the caudolateral aspect of the proximal right antebrachial region, resulting in impaired limb function. According to the previous medical history, the dog had undergone surgical excision of a tumor at the same site approximately two years earlier. Clinical examination revealed a well-defined, firm-elastic mass measuring approximately 6 × 5 × 3 cm that was non-painful on palpation. Histopathological examination demonstrated spindle-shaped cells arranged in a whorling pattern around capillary blood vessels, a characteristic finding consistent with PWT. En bloc surgical resection was performed to remove the tumor. Postoperative management included amoxicillin as an antibiotic, meloxicam as an analgesic, a hematopoietic supplement (Sangobion^®), and routine wound care with Bioplacenton^® gel. Twelve days after surgery, the surgical wound had dried completely, and the dog had returned to a normal clinical condition. A three-month postoperative follow-up revealed no evidence of tumor recurrence; however, this period represents only a short-term follow-up and is insufficient to assess long-term tumor recurrence.