51 Bulletin UASVM, Veterinary Medicine 65(1)/2008 pISSN 1843-5270; eISSN 1843-5378 SPONTANEOUS SKIN TUMORS IN DOGS AND CATS, SQUAMOUS CARCINOMA Lakatos I., A.I. Baba, C. Catoi, Gal A.F., Rus I.V., Katona Kinga University of Agricultural Sciences and Veterinary Medicine, Faculty of Veterinary Medicine, 3-5 Manastur Street, 3400 Cluj-Napoca, ROMANIA Keywords: skin; tumor; squamous carcinoma; dog. Abstract: Cutaneous cancers in pets have a constant development every year. In this investigation we purposed a study of canine skin tumors; detailing squamous carcinoma; and their correlations with breed; sex; age; and localization. In the same time was appreciated malignancy; based on microscopically images; especially nuclear aspect; cell homogeneity grade; the presence and grade of keratinisation; atypical mitosis; and cell polymorphism. In a period of 10 years had been diagnosed 597 animals with different tumor types; from these 202 being cutaneous neoformations; in carnivores were diagnosed 178 cases (88;3%) with cutaneous tumors. Squamous carcinoma had been diagnosed in 12 carnivores; respectivelly in dog 11 cases and 1 case in cat. The breeds diagnosed with squamous carcinomas were: Schnauzer (3 cases); stray dogs (2 cases); and one case for the folowing breeds: Rotweiler; Spaniel Cocker; German Brack; Doberman; and Fox Terrier. The localisation of squamous carcinoma was: legs – 4 cases; head region – 3 cases; and in cervical; scapula; dorsal and croup regions – 1 case for each region. Utilizing histological criteria for malignancy degree appreciation were established the following: squamous carcinoma with accentuated polymorph cells and increased number of mitosis (4 cases); squamous carcinomas with intense keratinisation (3 cases); squamous carcinomas with a reduced keratinisation (4 cases). INTRODUCTION The highest incidence of skin tumors is encountered in dogs; horses; cattle and cats; with an increased diversity of tumor types (1; 2). In specialty literature it is mentioned variable incidence of different cutaneous tumor types; such us: in cats; from 340 cutaneous tumor types; basal carcinoma represented 26%; with a mean age of 10;3 years; mast cell tumor represented 21%; with a mean age of 8;6 years; squamous carcinoma had been encountered in 15;5%; with a mean age of 11;6 years; fibrosarcoma had been encountered in 15% from cases; with a mean age of 10;2 years. Mast cell tumor was the only tumor diagnosed in animals smaller than 1 year (4). Madewell and Theilen (5) find that from a total of 908 canine skin tumors; 330 (36;3%) had an epithelial origin; and 578 (63;7%) had mesenchymal origin. From epithelial tumors; the authors identified the following tumor types: squamous carcinoma 5;6%; papilloma 1;9%; basal cell tumors 3;1%; sebaceous gland adenoma 6;6%; sebaceous gland adenocarcinoma 0;3%; trichoepithelioma 1;7%; pilomatricoma 1;0%; sweat gland adenoma 0;1%; sweat gland adenocarcinoma 0;2%; nonspecific tumors of the annexes; adenomas 9;1%; adenocarciomas 5;6%. Mesenchymal tumor types established from the same authors were: lipoma 34;4%; liposarcoma 0;1%; mast cell tumors 9;0%; melanoma and melanocytoma 4;7%; fibroma 2;2%; fibrosarcoma 1;7%; hemangioma 2;9%; hemangiosarcoma 0;8%; neurofibroma 0;4%; histiocytoma 2;9%; hemangiopericytoma 10;9%. Also; there were diagnosed tumors with a lower incidence of 1%: venereal tumors; lymphoma; leiomyoma; and myxoma. brought to you by CORE View metadata, citation and similar papers at core.ac.uk