Proximal femur alloprosthesis in a pediatric patient with Ewing sarcoma: Case report.

Introduction And Importance: Ewing sarcoma is a primary malignant tumor of bone and, to a lesser extent, soft tissues. Within oncological management, surgery with extensive local control and reconstruction is the most accepted option, however, the size, extension of the tumor, the age of the patient and distant involvement can make this option difficult.

Case Presentation: We present a clinical case of a 3-year-old infant with Ewing sarcoma in the proximal femur, who was managed with wide resection of the tumor plus proximal humerus allograft, which acted as a proximal femur for 2 years and then presented joint failure due to what was done was the application of a cemented stem over the remnant of the allograft to save the hip.

Clinical Discussion: In the presented case, similar to the report by Zoccali a malignant tumor in the proximal femur of a pediatric patient is documented. In these cases, where the distal femoral growth plate is disease-free, a reconstruction technique preserving the growth plate is proposed.

Conclusion: The technique of proximal femoral allograft with a proximal humeral graft is an acceptable reconstructive treatment alternative for young patients with Ewing sarcoma, especially when conventional treatment options are limited. This approach helps avoid limb-threatening surgeries such as amputation or rotationplasty, providing a viable and functional solution for limb salvage in these cases.