Melorheostosis

Description: The etiology and incidence of melorheostosis is unknown. It is often discovered as an incidental finding on radiographs acquired for other reasons. Other patients may have bone pain, limited range of motion, and joint fusion. The disease consists of cortical hyperostosis ("candle wax") in a dermatomal distribution. The location is usually diaphyseal. The process often crosses joints and may result in flexion contractures. The overlying skin may become thickened.