Abstract
Extraskeletal Ewing sarcoma is a rare clinical entity under the umbrella of the Ewing sarcoma family of tumors. The pathogenesis of the tumor has yet to be fully described, but a gene rearrangement and the resultant fusion protein characterize the molecular basis of the disease. Current therapy centers on cytotoxic chemotherapy and local control, either through surgical resection or therapeutic radiation. Survival data specific to extraskeletal Ewing sarcoma are limited due to the rare nature and varied presentation of the disease but parallel those of skeletally based Ewing sarcoma. This review contains 14 figures, 5 tables and 50 references. Key words: CD 99, Ewing sarcoma, EWS-FLI1, extraskeletal Ewing sarcoma, pediatric soft tissue sarcoma, t(11;22)
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