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Ollier disease
Background
Ollier disease: Enchondromatosis
An enchondroma is an island of unossified hyaline cartilage situated within bone (cartilage is the precursor of bone). They are usually multiple, affecting one or several bones. Characteristically, it is an asymmetric disorder, confined to one side of the body. The bones most commonly affected are the long bones, pelvis and bones of the hand. The islands of cartilage appear early in childhood and can develop, but it is very unusual for additional lesions to appear after puberty.
