Health condition
Sarcoma soft tissue guide
Soft tissue sarcomas are rare cancers of muscle, fat, nerve and connective tissue; outcomes are strongly linked to being diagnosed and treated in a specialist sarcoma centre from the outset.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Over 70 subtypes exist, each with its own behaviour and treatment nuances
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Any lump that is growing, larger than 5 cm, deep or painful needs urgent assessment
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Biopsy should ideally be planned by a sarcoma centre, not done ad hoc
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Surgery by a specialist team is the cornerstone of curative treatment
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Sarcomas arise from the body’s structural tissues and can appear almost anywhere - a thigh lump, an abdominal mass, a swelling on the trunk. Their rarity is the practical problem: most clinicians see very few in a career, and lumps are commonly assumed benign. The UK pathway therefore concentrates care in designated sarcoma centres, where radiology, biopsy, subtype-specific pathology and surgery are coordinated by one MDT.
Diagnosis and treatment routes
Treatment is built around complete surgical excision with clear margins, with radiotherapy added for many limb and trunk tumours and chemotherapy or targeted drugs reserved for specific subtypes and situations. Because the first operation is the best chance of cure, the sequence matters enormously: imaging and biopsy before excision, and referral before surgery rather than after an unplanned removal. If you are waiting for results or want a second opinion on a proposed plan, a private consultation with a specialist who treats this condition regularly can usually be arranged quickly, and most will review your existing scans, biopsy reports and MDT correspondence.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant sarcoma specialist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Sarcoma soft tissue guide.
Quick, plain-English answers to what people ask us most.
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What is soft tissue sarcoma?
Soft tissue sarcomas are rare cancers of muscle, fat, nerve and connective tissue that can arise almost anywhere in the body, and outcomes are strongly linked to being diagnosed and treated in a specialist sarcoma centre.
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What causes soft tissue sarcoma?
Most cases occur without an identifiable cause, though previous radiation exposure and certain genetic conditions increase risk in a minority of cases.
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What are the symptoms of soft tissue sarcoma?
The main symptom is a lump or swelling, often painless initially, that may grow over time; symptoms can also relate to pressure on nearby structures depending on location.
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Is soft tissue sarcoma serious?
Yes, it is a cancer requiring specialist treatment, but outcomes vary considerably by type, size and location, with many localised sarcomas treated successfully, particularly when managed at a specialist centre from the outset.
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How is soft tissue sarcoma treated?
Treatment usually involves surgical removal, often combined with radiotherapy, and sometimes chemotherapy depending on the specific sarcoma type, size and location.
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Why does treatment at a specialist centre matter for sarcoma?
Sarcomas are rare and diverse, and specialist centres have the concentrated expertise in pathology, surgery and oncology needed to correctly diagnose and optimally treat each specific subtype, which meaningfully affects outcomes.
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Soft tissue sarcoma vs a benign soft tissue tumour - what's the difference?
Benign tumours are far more common, generally smaller, superficial and slow-growing, whereas sarcomas are more likely to be large, deep, or growing - features that prompt biopsy to distinguish the two.
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When should I see a specialist about suspected soft tissue sarcoma?
See a doctor promptly for a lump with any red flag features. A private sarcoma specialist can typically be seen within about two weeks for assessment at a specialist centre.