Primary epiphyseal Ewing sarcoma: a case report.

Ewing sarcoma is a frequently seen malignant bone tumor of the childhood. The tumor involves the diaphyseal and metaphyseal bone and cases located in the epiphysis are unusual. We present a case of Ewing sarcoma limited to the epiphysis in an immature skeleton. We would like to emphasize the importance of the biopsy without contaminating the joint space which will reduce the morbidity during the curative surgery.