Ollier Disease

Ollier disease is a skeletal disorder characterized by multiple enchondromas, which are noncancerous (benign) growths of cartilage that develop within the bones. These growths may lead to skeletal deformities, limb discrepancy, and fractures. The enchondromas primarily occur in the limb bones, especially the bones of the hands and feet. They tend to develop near the ends of the bones, where growth occurs. Symptoms often appear in the first decade of life. The underlying cause of Ollier disease is not fully understood. In many people, the condition can be attributed to somatic mutations in the IDH1 or IDH2 gene. The disease is not typically inherited. Treatment is conservative in most cases, although surgery may be indicated in cases where complications (pathological fractures, growth defects, malignant transformation) arise.