Canine melanoma: A case report

A ten years old black female Labrador dog was presented to Private Pet Clinics, Delhi with history of anorexia and swelling near right eye since 6 months. On clinical examination, it revealed a small round growth. The growth was surgically excised. Grossly, it was black in colour, approximately 3 centimetres in diameter and soft in consistency. Histopathologically, it revealed pleomorphic epithelioid and fusiform shaped melanocytes with some of these neoplastic cells contained variable amount of melanin pigment in cytoplasm. On immunohistochemistry, it did not reveal any immunoreactivity for anti-pancytokeratin and anti-Ki67 antibodies. Based on the above findings, it was diagnosed as melanoma.