BOTRYOID RHABDOMYOSARCOMA IN THE URINARY- BLADDER OF YOUNG-DOGS

Three cases of botryoid rhabdomyosarcomas in the urinary bladder of yo ung large-breed dogs are presented, Clinical features consisted of hem aturia and stranguria, In one dog hypertrophic osteopathy was observed , In all cases the tumors could be clearly demonstrated by sonography, On gross pathology the tumors were polypoid masses that invaded the b ladder wall, Histologically, they consisted of undifferentiated mesenc hymal cells and varying numbers of spindloid, cross striated cell, and multinucleate giant cells, Immunohistologically, tumour cells stained positive for desmin. Our findings are in accordance with the few publ ications of botryoid rhabdomyosarcomas in the urinary bladder of dogs.