author(s)
C Nadhiya, MG Nair, R Kumar, AW Lakkawar S Uma and RMD Alphonse

abstract
Prospective studies were carried out from July, 2017 to December, 2017 on 30 clinical cases of canine mammary neoplasms. The median age of occurrence of mammary neoplasm was 9.5 years (range 3-15 years) with highest occurrence in the age group of 9 to < 12 years (56.67%). The median age of occurrence of benign mammary neoplasms was 9 years (4-12 years) and that of malignant mammary neoplasms was 10 years (3-15 years). The occurrence of neoplasms was more in pure breeds (19/30) than in non-descript dogs (10/30). Among the pure breeds, Labradors were most affected, followed by German shepherd, Pomeranian and Spitz breeds. All the cases were recorded only in intact females. Single gland involvement was seen in majority of the cases (25/30, 83.33%) than multiple glandular involvement. The gland on the left side were more affected (22/39, 56.41 %) compared to the right side (17/39, 5.59 %). Inguinal pair was most affected, followed by caudal abdominal and cranial abdominal pairs. Based on histological features, of the 30 cases, 18 (60 %) were of malignant type and 12 (40 %) of benign type. Among the benign neoplasms, benign mixed mammary tumor had the highest occurrence (5/30) followed by fibromyxoma and fibroadenoma (2/30) and solitary cases of complex adenoma, duct papilloma and myoepithelioma. Among the malignant neoplasms, simple carcinomas of various subtypes had the highest occurrence (7/30) followed by carcinoma in mixed tumor (3/30), carcinosarcoma (2/30,), comedo carcinoma (2/30), and solitary cases of fibrosarcoma, intraductal papillary carcinoma, complex carcinoma and anaplastic carcinoma.