NCIt definition : Hereditary disorder transmitted by autosomal dominant genes (EXT1-3) and characterized
by multiple exostoses (multiple osteochondromas) near the ends of long bones. The
genetic abnormality results in a defect in the osteoclastic activity at the metaphyseal
ends of the bone during the remodeling process in childhood or early adolescence.
The metaphyses develop benign, bony outgrowths often capped by cartilage. A small
number undergo neoplastic transformation.;