Ewing sarcoma is a cancerous tumor that grows in the bones or in the tissue around bones (soft tissue)—often the legs, pelvis, ribs, arms or spine. Ewing sarcoma can spread to the lungs, bones and bone marrow. This disease was first described at Memorial Sloan Kettering in 1921 by pathologist James Ewing.
There are approximately 250 new cases of Ewing's sarcoma diagnosed in the United States annually. Ewing’s sarcoma primarily involves children older than age 10, teens and adolescents, and young adults, usually up to the age of 30.
Compared to adult cancers, risks of most childhood cancers, including Ewing's sarcoma, cannot be affected by making lifestyle changes. Ewing's sarcoma has not been associated with any environmental risks. There are genetic changes that appear in the cells of people with Ewing's sarcoma. However, these happen after birth and are not inherited.
As there are no known risk factor that can be changed and no screening test to effectively identify someone prone to develop this cancer, there is no way to prevent it.
Source: Memorial Sloan Kettering Cancer Center, St. Jude's Hospital and WebMD.