What is Ewings sarcoma (ES)?
Ewing’s sarcoma is a cancer that occurs primarily in the bone or soft tissue. Ewing’s sarcoma can occur in any bone, but is most often found in the extremities and can involve muscle and the soft tissues around the tumor site. Ewing’s sarcoma cells can also spread (metastasize) to other areas of the body, most often to the lung, but less commonly to the bone marrow, kidneys, heart, adrenal gland, and other soft tissues. This type of bone tumor accounts for about 30 percent of pediatric bone cancers. Ewing’s sarcoma most often occurs in children between the ages of 5 and 20. Prior to adolescence, the number of males and females affected are equal. After adolescence, however, the number of males affected is slightly higher than the number of females. It has been suggested that the increased rate of growth among males during adolescence may account for this increased incidence.
