Rhabdomyosarcoma in children (RMS or ‘rhabdo’) is a tumor made up of cancerous cells that look like immature muscle cells. In the United States, about 350 new cases are diagnosed each year in children under 15. Almost two-thirds of children’s rhabdo cases develop in children under 10.
RMS may arise in any part of the body, but the most common sites for this tumor are:
- Adjacent to the base of the skull (parameningeal)
- Around the eye (orbital)
- Other superficial sites in the head and neck, such as the cheek or lip
- Arms and legs (extremities)
- Urinary system and reproductive sexual organs