Enchondromatosis is a rare primary bone dysplasia disorder characterized by the development of multiple mainly unilateral or asymmetrically distributed enchondromas throughout the metaphyses of the long bones. The disease is Orphanet_296 (Enchondromatosis). Also known as: Kast's syndrome, Ollier disease, Ollier's disease, dyschondroplasia, enchondromatosis with haemangiomata, enchondromatosis, multiple, osteochondromatosis.