JUVENILE RHABDOMYOSARCOMAS IN 2 DOGS

Juvenile rhabdomyosarcomas were diagnosed in two young dogs based on t he results of histopathology, phosphotungstic acid-hematoxylin stain, immunohistochemistry, and the age of the dogs. One dog, an 11-month-ol d Rottweiler, had tumor masses in the maxillary gingiva and the urinar y bladder. Histologically, the gingival mass was an alveolar type of r habdomyosarcoma and the urinary bladder mass was an embryonal type. Th e other dog, a 1.5-year-old Basset Hound, had an embryonal rhabdomyosa rcoma involving the oropharynx and the temporal muscles, with metastas is to the regional lymph node and lungs.