A tumour mass was surgically incised from the oral cavity of a labrador dog and submitted to the Department of Pathology, College of Veterinary Science, Tirupati for histopathological confirmation. Grossly, the tumour mass was solitary, pinkish white and measured 5-8 cm in diameter. The mass was firm and white to pink colour on cut surface. Cytological smears revealed spindle shaped cells with pleomorphic nucleus. Histologically, the tumour mass revealed interlacing fascicules of spindled shaped cells with oval to elongated nuclei vesicular chromatin with blunt ended. Prominent Nucleoli with numerous mitotic figures were also observed. Based on gross, cytology and histopathology the tumour was diagnosed as oral leiomayosarcoma.
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