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The objective of this study was to present the tumor incidence, detected in various tissue and organ samples from 132 cats, which were histologically evaluated at the Department of Pathology, Veterinary Faculty, Istanbul University between 1993- 2004. Of the 132 specimens, seven were obtained from necropsy, while 125 were biopsy samples.
Sexes of 15 cats are unknown. From those 117 cats whose sex are known 33 (28.20%) of them were male and 84 (71.79%) of them were female. Also ages of 10 cats from those 132 were unknown. From those 122 cats whose age are known 2 (1.63%) of them were younger then 1 years old, 22 (18.03%) of them were 1-5 years old, 56 (45.90%) of them were 6-10 years old, 37 (30.32%) of them were 11-15 years old and 5 of them were older then 15 (4.09%) years old. Nineteen (14.39%) of the evaluated tumours were benign and 113 (85.60%) of them were malign. Sixty (45.45%) of those tumours were epithelial, 67 (50.75%) of them were mesenchymal and 5 (3.78%) of them were mix tumours containing either of these components. The percentage of tumours distributed to different systems, organs and tissues were: female genital system 37.12%, muscular and skeletal system 16.16%, skin and appendages 15.90%, digestive system 12.87%, earlobe and ear channel 5.30%, abdominal wall and abdominal cavity 4.54%. eye and eyelid 3.78%, respiratory system, lymphatic and haematopoietic system and urinary system 1.51%.