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Soft tissue sarcoma

Soft tissue sarcoma is a rare type of cancer that starts in soft tissue, such as muscle and fat.

About this information

This NHS content is written for people in England. Services, entitlements and contact routes may differ in other countries.

Symptoms of soft tissue sarcoma

Symptoms

Tests and next steps for soft tissue sarcoma

Diagnosis

Treatment for soft tissue sarcoma

Medical treatments

The most common symptom of soft tissue sarcoma is a solid lump somewhere on your body that keeps growing larger.

The main tests for soft tissue sarcoma are blood tests, scans and a biopsy (where a sample of cells is collected for testing).

The main treatments for soft tissue sarcoma are surgery and radiotherapy. You may also be offered chemotherapy and targeted medicines.

Main symptoms of soft tissue sarcoma

The most common symptom of soft tissue sarcoma is a lump somewhere on your body.

It's usually found deep under your skin and you may feel it before you see it.

The lump is usually solid to the touch, painless and hard to move around under the skin.

It will continue to grow and as it does, it can become painful.

Other symptoms

You may also get other symptoms depending on where in your body the lump is.

These can include:

  • tummy pain and constipation if you get a sarcoma near your tummy
  • a cough that does not go away if you get a sarcoma near your lungs

See a GP if you have:

  • a lump or swelling somewhere on your body

Who is more likely to get soft tissue sarcoma

Soft tissue sarcoma is a rare cancer. It’s not always known what causes it.

You might be more likely to get it if you:

  • are over the age of 65
  • had radiotherapy in the past
  • have HIV – if left untreated, HIV can cause a type of soft tissue sarcoma called Kaposi’s sarcoma
  • have neurofibromatosis – a genetic condition that causes non-cancerous tumours to grow along the nerves
  • have retinoblastoma – a rare type of childhood eye cancer

Information

Tests for soft tissue sarcoma

You will need more tests and scans to check for soft tissue sarcoma if the GP refers you to a specialist.

Tests that the specialist may arrange include:

  • blood tests
  • scans, such as an ultrasound scan (sometimes from inside your body using an endoscope, which is a long, thin tube with a small camera inside), CT scan or MRI scan
  • collecting a small sample of cells from any lump using a needle (called a biopsy)

You may not have all these tests.

Treatment for soft tissue sarcoma

The treatment you’ll have for soft tissue sarcoma will depend on:

  • the type of soft tissue sarcoma
  • the size of the cancer
  • where it is in your body
  • if it has spread to your organs
  • your general health

Soft tissue sarcomas are usually treated using surgery and radiotherapy.

You may also be offered chemotherapy and targeted medicines.

The specialist care team looking after you will:

  • explain the treatments, benefits and side effects
  • work with you to create a treatment plan that is best for you
  • help you manage any side effects

You'll have regular check-ups during and after any treatments. You may also have tests and scans.

If you have any symptoms or side effects that you are worried about, talk to your specialists. You do not need to wait for your next check-up.

Where to find help and support

If you have soft tissue sarcoma, you and your loved ones will be supported throughout your treatment by a group of specialists.

The clinical nurse specialist, or another member of your specialist team will be able to give you information on local support services that you may find helpful.

There are also national cancer charities that offer support and information about soft tissue sarcoma.

Sarcoma UK

Information and support for anyone affected by sarcoma.

Macmillan Cancer Support

Information and support for anyone affected by cancer.

Cancer Research UK

Information and support for anyone affected by cancer.

Maggie's

Practical, emotional and social support for anyone affected by cancer.

Marie Curie

Care and support for anyone affected by a terminal illness.

Content supplied by the NHS website

Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

Licensed under the Open Government Licence v3.0 ↗. MyPHU is independent and is not endorsed by the NHS.