Pleomorphic Rhabdomyosarcoma on Maxillary Region in a Persian cat

Rhabdomyosarcomas are the skeletal and cardiac tumors and one of the easily metastatic tumors. A 10 years old DSH cat was referred to the surgery department of veterinary clinic with anorexia, halitosis, excessive salivation and a mass on left buccal region. After general anesthesia, the mass was resected from 5mm of healthy margin. In histopathology investigation, H&E staining, there is a complex of big, small and round rhabdomyocytes. Masson's trichrome staining showed that tumoral tissue was muscular. SMA was positive in many of tumoral cells. Desmin was positive in 60% of tumoral cells and myoglobin was positive in 80% of cells and moderate differentiated pleomorphic rhabdomyosarcoma was reported.