In particular, the incidence of ALT is 63% in osteosarcomas (10/16), 25% in chondrosarcomas (1/4), 36% in liposarcomas (4/11), 25% in leiomyosarcomas (1/4), 75% in alveolar rhabdomyosarcoma (6/8), 29% in embryonal rhabdomyosarcomas (2/7), and 0% in Ewing’s sarcomas (0/22). This evidence concerns the gene GPT and leiomyosarcoma.