Year : 2018, Volume : 42, Issue : 3
First page : ( 205) Last page : ( 206)
Print ISSN : 0250-4758. Online ISSN : 0973-970X. Published online : 2018 September 1.
Article DOI : 10.5958/0973-970X.2018.00054.8

Canine melanoma: A case report

Singh Surjeet¹, Gupta R.P.^1,*, Jangir B.L.¹, Sharma Shrikant¹, Soni Sapna¹

¹Department of Veterinary Pathology, College of Veterinary Sciences, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar-125004, India

*Corresponding author: e-mail: rpgupta2007@yahoo.co.in

Received:  13  June,  2018; Accepted:  17  August,  2018.

Abstract

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.

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Keywords

Dog, Histopathology, Malignant melanoma.

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ACKNOWLEDGEMENTS

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Figures

Fig. 1.: A small round growth near right eye (arrow)in black coloured female Labrador dog TopBack

Fig. 2.: Excised black coloured round growth TopBack

Fig. 3.: Melanoma: pleomorphic epithelioid and fusiform shaped melanocytes. H&E ×200 TopBack

Fig. 4.: Melanoma: neoplastic cells with large pleomorphic hyperchromatic nuclei containing prominent multiple nucleoli and indistinct cytoplasmic boundaries with variable amount of melanin pigment in cytoplasm and mitotic figures (arrows). H&E ×400. TopBack