Lesões melanocíticas em cães: Estudo retrospectivo de 70 casos (2006 - 2017)

Abstract

Melanoma is one of the most common cutaneous neoplasms in dogs and poor prognosis. Studies on the prevalence and distribution of cutaneous tumors in animals may help in the diagnosis in the clinical routine. The present study had as objectives the epidemiological and microscopic characteristics of melanocytic lesions in dogs attended at the Veterinary Hospital of the Federal University of Uberlândia. Were selected 75 melanocytic lesions from dogs and data on race, sex, age, coat and location of the lesions were collected from the necropsy sheets of the Animal Pathology Laboratory. Five lesions were diagnosed as melanose and 70 as neoplastic melanocytic lesions. Of the 70 samples, 11 were diagnosed as melanocytoma (15.71%), and the other 59 as melanoma (84.29%). Melanocytic neoplasms were more frequent in females (68.18%) and elderly (56.06%). Melanomas occurred more frequently in the trunk (44.29%) and head (28.57%) and in dogs with pale coat. Cutaneous melanocytic lesions in dogs are mostly malignant and other population studies may help in the enlightenment of the role of racial predisposition.