Sarcoma, Ewing

**Definition:** A malignant tumor of the bone which always arises in the medullary tissue, occurring more often in cylindrical bones. The tumor occurs usually before the age of 20, about twice as frequently in males as in females.

**Tree numbers:** - C04.557.450.565.575.650.800 - C04.557.450.795.620.800

**Synonyms:** - Ewing Sarcoma - Ewing Tumor - Ewing's Sarcoma - Ewing's Tumor - Sarcoma, Ewing's