Ewing's Sarcoma — Genes & Biomarkers Summary Table Ewing's Sarcoma — Genes & Biomarkers Biomarker / GeneBad ScoreFree ActionsNon-free Actions GENES EWSR1::FLI1 Present (driver, ~85%) Exercise, anti-inflam. diet EWS/FLI1 inhibitors, trials EWSR1::ERG Present (rare fusion) Genetic counseling, monitor CDK4/6 inhibitors, trials CDKN2A Deleted (poor prog.) Antioxidants, IF fasting Palbociclib, ribociclib TP53 Mutated (aggressive) Low-sugar diet, IF fasting APR-246, PRIMA-1MET BIOMARKERS CD99 High expression Regular follow-up, imaging Anti-CD99 immunotherapy LDH >200 U/L (poor prog.) Exercise, hydration CoQ10, NAC, vitamin D NSE Elevated (active disease) Stress mgmt., sleep hygiene B vitamins, magnesium NKX2.2 Overexpressed Anti-inflam. diet, exercise Tazemetostat (EZH2-i)