International Prospective Registry on Local Treatment Approaches in MLS

This is an international registry (a structured data-collection study) for patients with myxoid liposarcoma (MLS), a type of soft tissue cancer. The goal is to collect data on local treatment approaches — like surgery and radiation — to improve understanding of best practices across different countries. **You may be eligible if...** - You are 18 or older - You have been diagnosed with myxoid liposarcoma confirmed by biopsy (including the characteristic chromosomal change t(12;16)) - Your general health status is good to moderate (ECOG 0-2) - You are willing to share coded (de-identified) information in the registry **You may NOT be eligible if...** - You have previously received radiation to the area being studied - You are pregnant Talk to your doctor to see if this trial is right for you.