Recently, the expression of Bcl-2 and parathyroid-like hormone (PTHLH) as two antibodies that supported Ch diagnosis and differentiating them from other benign conditions as osteochondromas has been described [18], although in the present study, Bcl-2 expression was infrequent in the original tumours and in their corresponding xenograft. This evidence concerns the gene PTHLH and Osteochondroma.