Among patients with accelerated-phase CML, 55% (95% CI, 44 to 66) had a major hematologic response by 6 months (the primary end point). A major cytogenetic response was seen in 39%, 24% had a complete cytogenetic response, and 16% had a major molecular response....High response rates were observed among patients with BCR-ABL mutations, including those with the T315I mutation, and among those without BCR-ABL mutations...ponatinib showed clinically significant activity in patients with CML and those with Ph-positive ALL.