The purpose of this study is to determine the safest dose of the BCR-ABL inhibitor XL228, how often it should be taken, and how well people with leukemia tolerate XL228.
Single Group Assignment
There is one SNP
The subject has a confirmed pathologic diagnosis as evidenced by the presence of the BCR-Abl translocation [t(9;22)] by fluorescence in situ hybridization (FISH), cytogenetics, or quantitative polymerase chain reaction (QPCR) of one of the following: 1. CML - Chronic phase (CP) - Accelerated phase (AP) - Blast phase (BP) OR 2. Ph+ ALL 2. The subject has one of the following: - Known T315I Abl mutation - Known resistance to or intolerance of imatinib and dasatinib - At least one prior anti-leukemia therapy, including, but not limited to, interferon, imatinib, or dasatinib 3. The subject is at least 18 years old. --- T315I ---