 Elastic stable intramedullary nailing system (ESIN) requires a longer duration of external fixation for most procedures compared to flexible intramedullary nailing (FIN).Malignant transformations of any or multiple enchondromas are common in patients with Ollier disease and typically emerge in young adults often requiring surgery.The average age of patients of Ollier disease for their first surgery to treat their chondrosarcoma is thirty-three.