Vol. 9, Issue 5, Part G (2024)

Author(s): Abhijith SP, Kshama MA, Lathamani VS, Chetan Kumar GK and Abdul Kalam A

Abstract: Extraskeletal osteosarcoma, is a rare malignant mesenchymal soft tissue tumor unattached to skeletal framework and comprises of malignant cells of osteoblastic phenotype that produce osteoid. It often spreads to other parts of the body, including the lungs. It usually occurs in the thigh, shoulder or trunk region. A 11-year-old neutered male Great Dane was presented to Teaching Veterinary Clinical Complex of Veterinary College, Bengaluru with a history of selective feeding, inspiratory dyspnea, halitosis, dysphagia, hyporexia, ptyalism and progressive weight loss. A complete examination of oral cavity revealed multiple blackish-brown large masses on base of the tongue. The general clinical examination revealed increased capillary refill time, and mild pyrexia. The hematobiochemical values revealed neutrophilic leucocytosis, anaemic changes, elevated creatinine & ALP values. Radiography revealed no skeletal involvement of the mass. Surgical resection followed by histopathological analysis aided in further diagnosis. The multifocal formation of sclerotin and osteoid was well appreciable in the histopathology. The case was diagnosed as metastatic extraskeletal osteosarcoma.