Retrospective study on the incidence and type ofmammary gland tumors in dogs

There are some reports on the incidence of mammary gland tumor in most dog breeds in the world. There is littleinformation on its incidence and kind of mammary gland tumor in dogs in Iran. In this surgical and pathologicalstudies the incidence and kind of mammary gland tumor had been addresses in referral afflicted dogs from 2003-2008.130 bitches of various breeds, from 19 months to 14 years were referred to private pet clinic. Mammary tumorswere observed in 93 toy-breed bitches and in 37 large-breeds. Elective ovariohystrectomy and tumor removal werecarried out after the owners’ permission. Tumor mass and ovaries were sent for pathologic investigations.Tumors types that have been described in this study after pathological investigations consisted of serosaladenocarcinoma (47), squamous cell carcinoma (31), papillary adenocarcinoma (18), solid adenocarcinoma (18)and benign mix tumor (16) were.This study showed that the incidence of tumors in toy and large breeds were in agreement with the other reports.