Rhabdomyosarcoma is a cancerous (malignant) tumor of the muscles that are attached to the bones. This cancer mostly affects children.
Soft tissue cancer - rhabdomyosarcoma; Soft tissue sarcoma; Alveolar rhabdomyosarcoma; Embryonal rhabdomyosarcoma; Sarcoma botryoides
Rhabdomyosarcoma can occur in many places in the body. The most common sites are the head or neck, the urinary or reproductive system, and the arms or legs.
The cause of rhabdomyosarcoma is unknown. It is a rare tumor with only several hundred new cases per year in the United States.
Some children with certain birth defects are at an increased risk. Some families have a gene mutation that increases this risk. Most children with rhabdomyosarcoma do not have any known risk factors.