Inclusion criteria | Exclusion criteria |
---|---|
written informed consent | missing written informed consent |
histologically confirmed, primary or locally recurrent soft tissue sarcoma of the retroperitoneal space | missing histological conformation of soft tissue sarcoma |
judged as at least marginally resectable | Desmoid Tumors (aggressive fibromatosis), Gastrointestinal Stroma Tumors (GIST) |
absence of distant metastases | judged as gross incomplete or not resectable |
tumor size ≥ 5 cm | incomplete staging |
presence of distant metastases | |
prior radiation therapy to the abdominal region | |
participation in another clinical interventional study | |
inflammatory bowel disease |