RRJoVST (2015) 27-28 © STM Journals 2015. All Rights Reserved Page 27 Research & Reviews: Journal of Veterinary Science and Technology ISSN: 2319-3441(online), ISSN: 2349-3690(print) Volume 4, Issue 3 www.stmjournals.com Mammary Gland Fibroadenoma in a Bitch Sanjiv Kumar*, Ramesh Tiwary Department of Pathology and Surgery, Bihar Veterinary College, Patna, Bihar, India Abstract The work was conducted on an adult German shepherd bitch having a growing lump in the mammary gland. Tentatively it appeared to be a case of benign tumour of first left thoracic mammary gland. Sample was collected for cytopathological and histopathological examination of the affected tissue. FNAC was done by Papanicoloau’s stain while routine paraffin embedding technique was employed for histopathological examination, which revealed it to be a case of mammary gland fibroadenoma which was then surgically removed successfully with full recovery. Keywords: Mammary gland fibroadenoma, benign tumour, FNAC *Author for Correspondence E-mail: mrsanvet@rediffmail.com INTRODUCTION The frequency of mammary neoplasm in different species varies tremendously. The dog is by far the most frequently affected domestic species. Approximately 50% of all the tumours in the bitch are mammary tumours. However, it is rare in cows, mares, does, ewes and sows. The occurrence frequency in dogs varies in different breeds. The greatest frequency of mammary tumour is found in poodles, Boston terriers, sporting dogs etc. Roughly 80% of canine mammary tumours are diagnosed in bitches above 7 years of age. About 25–50% cases are of malignant mammary carcinoma [1]. Mixed mammary tumours are most common in bitches [2]. According to WHO, canine mammary tumours are histologically classified in four categories i.e. malignant, benign, unclassified and hyperplasia/dysplasia. This classification reflects cellular atypia, pattern of neoplastic growth, the origin of neoplastic cells and descriptive morphology of each cellular component. The types of mammary tumour are determined by the histologic type, degree of invasiveness, amount of differentiation of cellular elements and mitotic index [3]. The most common site of canine mammary tumour is the caudal mammary masses, which may vary from microscopic to grossly visible, of various sizes. Masses may be sessile or pedunculated, solid or cystic and ulcerated or covered with skin and hair. It may be single or multiple, soft or firm. Colour may be red, purple to grayish white. In the present case a German shepherd bitch aged about six years was brought to clinical complex, Bihar Veterinary College, Patna, for treatment with history of a lump growing over a period for two months in the mid ventral abdomen (Figure 1). The animal was showing intense pain, reluctant to move and anorexia. It has been undergoing chemotherapy for the last few days. Fig. 1: Gross Photograph Showing a Lump in the Mid Ventral Abdomen of a Labrador Bitch.