Ewing's sarcoma of the hip presenting as a benign cystic lesion.

J Surg Orthop Adv. 2007 Summer;16(2):84-8.
Papagelopoulos PJ, Mavrogenis AF, Benetos IS, Papaparaskeva K, Galanis EC, Soucacos PN.
A 14-year-old girl with a Ewing's sarcoma of the left femoral head and neck is presented. The imaging features mimicked a benign cystic lesion. Biopsy and molecular analysis confirmed the diagnosis. The patient was treated with chemotherapy, wide tumor resection, and proximal femoral reconstruction using an allograft-prosthesis composite. Differential diagnosis, imaging, and pathologic features of Ewing's sarcoma are discussed. Comment in: J Surg Orthop Adv. 2007 Winter;16(4):207; author reply 207.