Revision total knee arthroplasty with long-stem prosthesis following primary knee replacement for giant cell tumor with fracture: a case report.

This case report describes a 30-year-old woman with a rare giant cell tumor (GCT) in the distal femur complicated by a fracture. Initially, treated with total knee arthroplasty, the patient experienced implant loosening after four years, requiring revision surgery with a long-stem prosthesis. The procedure successfully restored joint stability and function, with no tumor recurrence observed at the 18-month follow-up. This case demonstrates the effectiveness of megaprosthetic revision in managing complex GCT-related failures, offering both oncologic control and durable biomechanical reconstruction.