Small-round-cell tumor differential

• if < 5 yrs. and there are small round cells think neuroblastoma or leukemia
• if approximately 10 years think eosinophilic granuloma
• if 10-30 yrs and there are small round cells think Ewing's
• if >30 yrs think lymphoma
• if > 50 yrs. and there are small round cells think myeloma