A tumour with room to hide
The retroperitoneum — the space behind the abdominal contents — lets tumours grow to a large size before causing symptoms. Most are found as a vague mass, abdominal fullness, or an incidental scan finding. Leg swelling, back pain or bowel symptoms suggest pressure on adjacent structures.
- A palpable abdominal mass or increasing girth
- Vague fullness, early satiety or discomfort
- One-sided leg swelling or back pain
- Incidental finding on a scan done for another reason
Before any operation: biopsy and MDT
A retroperitoneal mass should be biopsied by image guidance — not simply removed — because the cell type changes the plan. A dedicated sarcoma multidisciplinary team reviews the imaging and pathology together; surgery for sarcoma done casually, without this planning, compromises the one best chance of cure.
Compartmental en-bloc resection
The tumour is removed in one piece together with organs it touches — often a kidney, colon or part of the diaphragm — because the margin around the tumour determines recurrence. Vascular resection and reconstruction may be needed and are planned in advance, not improvised.
- En-bloc resection with involved organs
- Vascular resection and reconstruction capability
- Sarcoma MDT review before and after surgery
- Long-term imaging surveillance
Recurrence and surveillance
Retroperitoneal sarcomas can recur even after excellent surgery, which is why surveillance CT scans continue for years. When recurrence happens, repeat surgery is often possible — another reason to stay within a sarcoma programme.
Common questions
- Are retroperitoneal tumours always cancer?
- No — some are benign. But size and imaging features often cannot prove this, which is why biopsy and sarcoma MDT review come before any decision.
- Will I lose a kidney or other organs?
- Sometimes an organ the tumour touches is removed to achieve a clear margin. Most people live completely normally with one kidney or after partial colon removal — the trade-off is deliberate and discussed in detail beforehand.
- Is chemotherapy or radiotherapy used for sarcoma?
- It depends on the subtype. Radiotherapy is used for many retroperitoneal sarcomas; chemotherapy has a limited role in some types. The MDT sequence is decided case by case.
Related reading
This page is general education, reviewed by Dr. Ishaan Allahabadi, MCh Surgical Oncology (Edge Hill, UK) · MS Surgery · MBBS (Accredited by the Royal College of Surgeons of England). It is not a substitute for individual medical advice. Treatment decisions are made after reviewing your imaging and pathology, in a multidisciplinary tumour board.