Vol. 10, Issue 4, Part F (2025)

Author(s): Bharathidasan M, Arun Prasad A, Hemalatha S, Jeyaraja K, Mohamed Shafiuzama and Serma Sarvana Pandian A

Abstract: The study was carried out in the Small Animal Surgery Unit of Madras Veterinary College, Chennai during the period of January 2022 to December 2024. Based on Fine Needle Aspiration Cytology (FNAC) malignant tumours were included for this study. Sex wise distribution were 63 male dogs (52.95%) and 56 female dogs (47.05%). Age of the affected dogs were from 1 year to 14 years with mean age of 8 years and standard deviation of 3.4 years. 57 dogs (47%) were affected in head and neck region, abdomen 45 dogs (37.8%), thoracic cavity 9 dogs (7.5%) and limbs 8 dogs (6.7%). 0-3 years 16(13.4%), 4-6 years 19(15.9%), 7-9 years 33(27.7%), 10-12 years 41(34.4), 13-15 years 10(8.4%) age wise distribution of tumours in dogs. Breed wise distribution were Mongrel dog 35 (29.4%), Labradors 18 (15.1%), Golden Retrievers 13(10.9%), German Shepherd dog 9 (7.6%), Rottweiler’s 8 (6.7%), Spitz 8(6.7%), Doberman 7 (5.9%), Beagle 3(2.5%), Boxer 3(2.5%), Great Dane 3(2.5%), Chippiparai 2 (1.7%), Dachshund 2(1.7%), Pug 2 (1.7%), Siberian Husky 2 (1.7%), Terrier 2(1.7%), Shih Tzu 1(0.8%) and Dalmatian 1(0.8%). The results of Fine Needle Aspiration Cytology (FNAC) of malignant tumours were adenocarcinoma 19 (15.9%), osteosarcoma 14(11.8%), hemangiosarcoma 13(10.9%), sarcoma 10 (8.4%), Fibrosaroma 9 (7.6%), Lymphoma 7 (5.8%), hepatocellular Carcinoma 5(4.2%), leiomyosarcoma 4 (3.4%), squamous cell carcinoma 4 (3.4%), mammary gland adenocarcinoma 3 (2.5%), fibrosarcoma, mast cell tumour, mesothelioma, osteochondroma, perineal adenocarcinoma, steroli cell Tumour, transitional cell carcinoma and Uveal melanoma each 1 (0.8%). Lung metastasis was absent in 78(65.5%) and present in 41(34.5%) dogs. Computerized Tomography study revealed the presence of either regional or sentinel lymph node involvement and metastasis in 49 (41.2%) dogs and no involvement in 70 (58.2%) dogs.