Glomangioma in the Prepuce of a Dog

Contents A case of preputial glomangioma in an 8‐year‐old Springer Spaniel dog is reported. The dog presented a solitary nodular mass, approximately 3.5 × 5.2 cm in diameter, located on the lateral wall of the prepuce at the base of the penis. Histologically, the excised tumour mass consisted of proliferating round epithelioid cells arranged in a cordon‐like structure around small blood vessels. The neoplastic cells were positive for alpha smooth muscle actin and negative for cytokeratin, desmin, S‐100 protein and neurone‐specific enolase. Based on these pathologic features, the tumour was diagnosed as glomangioma, a neoplasm extremely rare in dogs. To our knowledge, this is the first report of preputial glomangioma in the dog.