Changes to This Summary (12/08/2011)

The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

General Information ¹

Added text ² to state that the U.S. National Cancer Institute Surveillance, Epidemiology, and End Results database was used to compare patients younger than 40 years with Ewing sarcoma who presented with skeletal and extraskeletal primary sites. Patients with extraskeletal Ewing sarcoma were more likely to be older, female, non-white, and have axial primary sites, and they were less likely to have pelvic primary sites compared with patients with skeletal Ewing sarcoma (cited Applebaum et al. as reference 14).

Added Table 1 ³ about the characteristics of children with extraskeletal Ewing sarcoma and skeletal Ewing sarcoma.