Indian Journal of Veterinary Pathology
  • Year: 2026
  • Volume: 50
  • Issue: 2

Cutaneous junctional melanocytoma in a dog: Clinical, cytological, histopathological and immunohistochemical evaluation

  • Author:
  • M. Mani Bharathi1, S. Ramesh2,*, M. Sandhya Bhavani3, N. Pazhanivel4, G.V.S. Rao2, G. Vijayakumar5, G. Navyasree6, R.C. Sundararajan7
  • Total Page Count: 3
  • Page Number: 177 to 179

1Ph.D. Scholar, Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Mannuthy, Thrissur, KVASU

2Professor (Retd.), Department of Veterinary Pathology, Madras Veterinary College, Chennai, TANUVAS

3Assistant Professor, Department of Clinics, Madras Veterinary College, Chennai, TANUVAS

4Professor, Department of Pathology, Madras Veterinary College, Chennai, TANUVAS

5Professor and Head, Department of Clinics, Madras Veterinary College, Chennai, TANUVAS

6MVSc Scholar, Department of Veterinary Public Health and Epidemiology, Madras Veterinary College, Chennai, TANUVAS

7Phd Scholar, Department of Clinical Medicine, Ethics and Jurisprudence, College of Veterinary and Animal Sciences, Mannuthy, Thrissur, KVASU

*Address for correspondence: S. Ramesh, Professor (Retd.), Department of Veterinary Pathology, Madras Veterinary College, Chennai, TANUVAS; Email: rameshlibya2010@gmail.com

Abstract

A 4-year-old Rottweiler dog had a black, firm nodule noticed in the dorsal aspect of a paw region in the periungual region at the nail bed/nail fold area of the paw. Cytology revealed brownish-black pigments dispersed throughout the cytoplasm and histopathology revealed melanocytic cells extending from the dermo-epidermal junction into the deep dermis with melanin granules. Immunohistochemistry confirmed strong Melan-A expression.

Keywords

Cytology, Dog, Histopathology, Immunohistochemistry, Junctional melanocytoma