Malignant Transformation in Ollier's Disease: A Novel Stem for a Tibial Megaprosthesis

Ollier’s disease is a rare syndrome characterized by multiple enchondromas with the potential for malignant transformation. The treatment for secondary chondrosarcoma is surgical resection, which can be a morbid procedure depending on the location and size of the tumor. We present a successful limb salvage in which the majority of the tibia was removed and replaced with a megaprosthesis. The complex reconstruction in this case required the use of a novel uncemented stem.