_1749583256 20250610192056000 Rovedar Daryoushbabazadeh@gmail.com Rovedar Journal of Veterinary Physiology and Pathology J. Vet. Physiol. Pathol. 2821-0328 06 01 2025 4 2 Rahul Kumar https://orcid.org/0000-0002-2970-4285 Rudra Pratap Pandey https://orcid.org/0000-0002-4401-1882 Introduction: Ovarian teratomas are uncommon tumors in female dogs, characterized by the presence of tissues derived from embryonic layers. Although most ovarian teratomas are benign, histopathological evaluation is crucial for accurate clinical diagnosis and management. The present report presented a rare case of tridermal teratoma in an eight-year-old bitch and its successful surgical management.                      Case report: In the present case report, an eight-year-old Indian Pariah bitch weighing 16.7 kg was presented to the Teaching Veterinary Clinical Complex, India with anorexia and abdominal distention. Radiography and ultrasonography of the abdomen revealed two abnormal masses in the abdominal cavity. The bitch was operated for exploratory laparotomy, and the masses were removed. One mass weighed 4.2 kg and was 30×22×14 cm in size, while the other mass, which was attached to the left ovary, weighed 0.2 kg and was 7×5×4 cm in size. Grossly, both masses demonstrated encapsulation, lobulation, and severe congestion. The external surface of the masses had pigmentation. In contrast, the cut surface revealed cystic spaces filled with tufts of hair embedded in thick, creamy-white sebaceous material, along with fat and bone tissues. Histopathological examination confirmed both masses as benign mature cystic teratomas, comprising well-differentiated structures derived from all three germ layers. Conclusion: The abnormal masses of cystic teratomas in the abdominal cavity were diagnosed and successfully removed by surgery. 06 02 2025 6 11 https://creativecommons.org/licenses/by/4.0 10.58803/jvpp.v4i2.54 https://jvpp.rovedar.com/index.php/JVPP/article/view/54 https://jvpp.rovedar.com/index.php/JVPP/article/download/54/76 https://jvpp.rovedar.com/index.php/JVPP/article/download/54/76 10.1056/NEJM197501092920202 10.1177/030098588502200204 10.1292/jvms.66.861 10.1002/9781119181200 10.1023/B:VERC.0000014180.77684.52 10.1638/2016-0026.1 10.17221/79/2009-VETMED 10.3906/vet-1103-31 10.1590/1678-4162-10434 Johnston SD, Root Kustritz MV, and Olson PNS. Canine and feline theriogenology. Philadelphia: Saunders; 2001. p. 202-203. Available at: https://vetbooks.ir/canine-and-feline-theriogenology/ 10.17221/55/2021-VETMED 10.1292/jvms.62.793 Cotchin E. Neoplasia in the dog. Vet Rec. 1954; 66: 879-885. 10.1136/vr.158.16.565 10.1530/revreprod/4.2.90 10.2460/javma.1987.191.01.81 10.4172/2157-7099.1000463 McCantee K. Reproductive pathology of domestic mammals. San Diego: Academic Press; 1990. p. 77-79, 295-296. Available at: https://openlibrary.org/books/OL2198324M/Reproductive_pathology_of_domestic_mammals Akbulut M, Kelten EC, and Ege CB. Mature cystic teratoma with predominantly neurogenic elements—Case report. Aegean Pathol J. 2006; 22: 18-20. Available at: https://turkjpath.org/uploads/pdf/pdf_APJ_700.pdf 10.36959/351/585 Lopez D, Singh A, Wright TF, Gartley C, and Walker M. Single incision laparoscopic-assisted ovariohysterectomy for an ovarian tumor in a dog. Can Vet J. 2017; 58(9): 975-979. PMID: 5556487 10.1148/rg.251045074