Cohort to Augment the Understanding of Sarcoma Survivorship Across the Lifespan

This study is building a long-term research database (cohort) to better understand what life is like for sarcoma survivors — a rare type of cancer affecting bones or soft tissues. It will follow survivors over time and also includes their caregivers and siblings to understand the broader impact of the disease. **You may be eligible if...** - You are a patient of any age with a history of sarcoma (bone or soft tissue cancer), with or without current evidence of disease - For pediatric patients: parents/primary caregivers and siblings aged 8 or older may also participate **You may NOT be eligible if...** - You are not a sarcoma survivor or connected family/caregiver member as described above Talk to your doctor to see if this trial is right for you.