Rhabdomyosarcoma is a cancerous (malignant) tumor of the muscles that are attached to the bones.
It can occur in many places in the body. The most common sites are the head and neck, the urogenital tract, and the arms or legs.
Soft tissue sarcoma; Alveolar rhabdomyosarcoma; Embryonal rhabdomyosarcoma; Sarcoma botryoides
Rhabdomyosarcoma is the most common soft tissue tumor in children.
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.
The most common symptom is a mass that may or may not be painful.
Other symptoms vary depending on location of the tumor:
- Tumors in the nose or throat may cause bleeding, congestion, swallowing problems, or neurological problems if they extend into the brain.
- Tumors around the eyes may cause bulging of the eye, problems with vision, swelling around the eye, or pain.
- Tumors in the ears, may cause pain, hearing loss, or swelling.
- Bladder and
vaginal tumorsmay cause lead to trouble starting to urinate or having a bowel movement, or poor control of urine.
- Muscle tumors may lead to a painful lump, and are often thought to be an injury.
Exams and Tests
Diagnosis of rhabdomyosarcoma is often delayed because of lack of symptoms and because the tumor may appear at the same time as a recent injury. Early diagnosis is important because rhabdomyosarcoma spreads quickly.
A complete physical exam should be done. Tests may include:
Biopsyof the tumor
- Chest x-ray
- CT scan of the chest to look for spread of the tumor
CT scanof the tumor site
- Bone marrow biopsy (may show the cancer has spread)
Bone scanto look for spread of the tumor MRIscan of the tumor site
- Spinal tap (
Treatment depends on the site and type of rhabdomyosarcoma.
Either radiation or chemotherapy, or both, will be used before or after surgery. In general, surgery and radiation therapy are used to treat the primary site of the tumor. Chemotherapy is used to treat disease at all sites in the body.
Chemotherapy is an essential part of treatment to prevent further spread of the cancer. Many different chemotherapy drugs are active against rhabdomyosarcoma. Your doctor will discuss these with you.
While aggressive treatment is usually necessary, most children with rhabdomyosarcoma achieve long-term survival. Cure depends on the specific type of tumor, its location, and how much it has spread.
- Complications from chemotherapy
- Location in which surgery is not possible
When to Contact a Medical Professional
Call your health care provider if your child has symptoms of rhabdomyosarcoma.