An Observational Study on Epithelioid Sarcoma

This is an observational study collecting information about patients with a rare cancer called epithelioid sarcoma — a type of soft tissue cancer — to better understand how it behaves and how patients respond to treatments. **You may be eligible if...** - You have been diagnosed with epithelioid sarcoma, confirmed by a tissue biopsy according to 2014 World Health Organization standards - You are willing to sign a consent form - You are able to attend follow-up visits and comply with study requirements - There is no age limit — children and adults are welcome **You may NOT be eligible if...** - You have been diagnosed with another cancer in the past 5 years (except for non-invasive cervical cancer or certain skin cancers that were fully treated) - You are unable to comply with study visits or follow-up requirements Talk to your doctor to see if this trial is right for you.