. . . . . . . . . . . . "[Two patients with multiple osteochondromas demonstrated a germline mutation combined with loss of the remaining wild-type allele in three osteochondromas, indicating that, in cartilaginous cells of the growth plate, inactivation of both copies of the EXT1 gene is required for osteochondroma formation in hereditary cases.]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . . "Gene-disease associations manually curated."@en . "DisGeNET evidence - CURATED"@en . "2016-01-25"^^ . "2016-05-13T12:41:50+02:00"^^ . . . . . . . . . . . "v4.0.0.0" . "v4.0.0" .