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Cancer Explained
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Rhabdomyosarcoma

A plain-language explanation of rhabdomyosarcoma, the most common soft tissue sarcoma in children, and how it is treated. Based on the National Cancer Institute.

NCI source

Last reviewed: 2026-07-07

The short answer

Rhabdomyosarcoma is a cancer that forms in soft tissues, usually in cells that would become skeletal muscles. It is the most common soft tissue sarcoma in children and can appear in many parts of the body. Treatment usually combines chemotherapy, surgery, and sometimes radiation.

  • Rhabdomyosarcoma forms in soft tissue, usually in cells meant to become skeletal muscle.

  • It is the most common soft tissue sarcoma in children.

  • It can occur in many parts of the body, including the head and neck, urinary and reproductive organs, and limbs.

  • Symptoms depend on where the tumor is — often a lump or swelling.

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The full explanation.

The simple version

Rhabdomyosarcoma is a cancer that forms in soft tissue, usually in cells that would normally become skeletal muscle. It is the most common soft tissue sarcoma in children and can appear in many parts of the body.

Where it appears

Because the cells it starts in are found throughout the body, rhabdomyosarcoma can occur in many places, including the head and neck, the bladder and reproductive organs, and the arms or legs. The location affects both the symptoms and the treatment plan.

Symptoms

Symptoms depend on where the tumor is. Often the first sign is a lump or swelling that may or may not hurt. Tumors in certain areas can cause other effects, such as trouble with the eyes, urination, or breathing, depending on location.

How it is treated

Treatment usually combines chemotherapy with surgery to remove the tumor and, in many cases, radiation therapy. The exact plan depends on the tumor's location, size, and whether it has spread.

The tumor's location shapes both the symptoms and the treatment plan.

Words to know

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Common questions

What is rhabdomyosarcoma?

Rhabdomyosarcoma is a cancer that forms in soft tissues, usually in cells that would normally develop into skeletal muscles. It is the most common soft tissue sarcoma in children.

Where does it occur?

It can appear in many parts of the body, including the head and neck, the bladder and reproductive organs, and the arms or legs.

What are the symptoms?

Symptoms depend on where the tumor is. Often the first sign is a lump or swelling, which may or may not be painful. Other signs depend on the location.

How is it treated?

Treatment usually combines chemotherapy with surgery to remove the tumor and, in many cases, radiation therapy.

What affects the outlook?

The outlook depends on the tumor's location, size, type, and whether it has spread. Your child's team can explain the specifics.

Questions to ask your doctor

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0 of 4 answered

  1. Q1.Rhabdomyosarcoma usually forms in cells meant to become what?
  2. Q2.Among children, rhabdomyosarcoma is the most common what?
  3. Q3.What is often the first sign?
  4. Q4.What does treatment usually combine?

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Rhabdomyosarcoma