HISTOPATHOLOGICAL STUDIES ON CANINE MAMMARY TUMORS
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Authors
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I. Hemanth
Assistant Professor, Department of Veterinary Pathology, College of Veterinary Science, Sri Venkateswara Veterinary University, Proddatur, Andhra Pradesh
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R. Kumar
Department of Veterinary Pathology, Rajiv Gandhi Institute of Veterinary Education and Research, Kurumbapet, Puducherry
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K. C. Varshney
Department of Veterinary Pathology, Rajiv Gandhi Institute of Veterinary Education and Research, Kurumbapet, Puducherry
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M. G. Nair
Department of Veterinary Pathology, Rajiv Gandhi Institute of Veterinary Education and Research, Kurumbapet, Puducherry
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M. Sivakumar
Department of Veterinary Anatomy and Histology, Rajiv Gandhi Institute of Veterinary Education and Research, Kurumbapet, Puducherry
Keywords:
Benign, Canines, Histopathology, Malignant, Mammary tumorsAbstract
Tumors affecting mammary gland are the most common neoplastic condition encountered in dogs. Frequency of occurrence and histopathological features of canine mammary tumors were investigated.A total of 54 tumor samples were collected from 51 clinical cases. All the samples were subjected to routine histopathological evaluation and classified according to WHO nomenclature.Among 54 samples, 12.96% were diagnosed as benign tumors that include cystadenoma, myxoma and mixed mammary tumors. Malignant tumors constitute 87.04% of the samples that comprised of regular adenocarcinomas (42.55%), special carcinomas (27.66%), sarcomas (8.52%), carcinosarcomas(17.01%) and carcinomas arising in mixed tumors (4.26%). Regular carcinomas include tubular, papillary, tubulopapillaryand ductal carcinomas. Special types were micropapillary adenocarcinoma, solid carcinoma, carcinomas with squamous differentiation and anaplastic carcinoma. Sarcomas include fibrosarcoma, osteosarcoma, combined sarcoma and hemagiosarcoma. The wide versatility of canine mammary neoplasms with respect to their histological features and higher incidence of malignant variety of tumors is very clearly evident in this study.
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