Surgical management of scrotal mast cell tumor in a geriatric dog

A 12-year-old non-descript male dog was presented with a history of progressive swelling in the scrotal region of two months duration, accompanied by concentrated urine. Clinical examination revealed a firm, non-reducible swelling confined to the scrotal tissue, with both testes palpable and normal in size and consistency. Hematological evaluation showed mild anemia and neutrophilia, but no major systemic abnormalities. Based on clinical suspicion, surgical excision with scrotal ablation and bilateral orchiectomy was performed under general anesthesia. The excised mass was submitted for cytopathological examination, which revealed a moderately differentiated mast cell tumor (MCT), categorized as high grade on the Kiupel two-tier system and Grade II on the Patnaik scale. Postoperative recovery was uneventful with no evidence of local recurrence at 30 days. This report highlights the surgical management and pathological features of scrotal mast cell tumors in dogs.