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Nailbed malignant melanoma in three dogs

  • Jo, Hyoung-Nam (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Suh, Myeong-Won (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Lee, Joo-Ok (Ekklim Anima Hospital) ;
  • Kim, Jae-Hoon (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
  • Received : 2019.07.12
  • Accepted : 2019.10.17
  • Published : 2019.12.31

Abstract

Three 8-12-year-old male cocker spaniels presented with an appendicular mass accompanied by pain, inflammation, lameness, and loss of nail in the digits of the forelimb or hindlimb. A histological examination revealed dermal masses of the digit composed of numerous neoplastic cells with marked pleomorphism and high mitosis. The neoplastic cells showed a strong invasive tendency into the epidermis and adjacent bony tissues, such as distal phalanx. Immunohistochemistry of the neoplastic cells in three masses revealed positive reactions for Melan-A. These three dogs were diagnosed as nailbed malignant melanoma in the digit based on the history, clinical signs, and histopathologic features.

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