Vaccination trials of fusion gene-derived peptides have been reported with BCR-ABL in 12 patients with chronic myelogenous leukemia[16], EWS-FLI1 in 12 patients with Ewing's sarcoma[17], and PAX3-FKHR in four patients with alveolar rhabdomyosarcoma[17]. Here, BCR is linked to chronic myelogenous leukemia, BCR-ABL1 positive.