A new reconstruction technique of tumor-induced large patellar defect, and its 8-year follow-up.

Abstract

Patellar tumors are rare. However, aggressive tumors such as giant cell tumors of the bone can cause large defects. The treatment of large patellar defects remains controversial. This case report presents the results of a new reconstruction method applied to a 40-year old man with a large patellar defect due to a giant cell tumor of the bone, along with an 8-year follow-up. The defect was reconstructed using a handmade neopatella. This neopatella was created using a bony Achilles tendon allograft and patellar polyethylene. Postoperatively, good results were achieved without hindering the patient's ability to farm. These excellent functional results were still maintained at the eighth year of follow-up. This reconstruction method allowed for the restoration of extension strength by re-establishing the lever arm of the extensor mechanism. The main advantages of this method compared to fresh-frozen allografts are the longer shelf life of the materials used and the modularity of both patellar thickness and patellar height. This method may be a new and promising alternative to fresh frozen quadriceps-patella-patellar tendon allografts in the reconstruction of large patellar defects.   Cite this article as: Özgezmez FT. A new reconstruction technique of tumor-induced large patellar defect, and its 8-year follow-up. Acta Orthop Traumatol Turc. Published online April 24, 2026. doi: 10.5152/j.aott.2026.25434.