When is radiotherapy recommended for soft tissue sarcoma?

Radiotherapy before surgery can make the treatment area smaller, but it may affect wound healing. Radiotherapy after surgery may be chosen when the tumour was large, close to important structures, difficult to remove with a clear margin, or has features suggesting a higher chance of returning in the same region. The decision also reflects the sarcoma subtype, its position in an arm, leg, trunk or deeper tissue, and the operation’s effect on function. If surgery cannot remove all disease safely, radiotherapy may focus on a remaining or returning tumour. It can reduce pain, pressure, bleeding or movement problems, although it does not suit every tumour or every treatment goal.

Confirm that a sarcoma specialist team has reviewed the biopsy and imaging, because subtype and location shape treatment. Ask whether radiotherapy is planned before or after surgery, what margin or structure is being protected, and how the plan may affect wound healing, movement, strength, skin and swelling. Tell the team about implants, previous operations, prior radiotherapy and medicines that affect healing. If an operation is planned, ask how long recovery and physiotherapy may take and who will coordinate them with radiation treatment.

Contact the treating team promptly if a lump grows quickly, pain becomes difficult to control, a limb becomes newly weak or swollen, or a wound becomes red, hot, separated or draining. Seek urgent care for severe bleeding, sudden loss of movement, or rapidly worsening breathing. These signs need examination; a lump or pain alone cannot determine whether a sarcoma is present or whether radiotherapy is needed.

What does my sarcoma subtype and margin status mean for local treatment? Would treatment before surgery or after surgery fit better, and why? What are the effects on wound healing, movement, nerves and swelling? If the tumour returns, what other local or whole-body options should be considered?