USH2A and chronic myelogenous leukemia, BCR-ABL1 positive: In addition, the incidence of CML was compared within the most frequent USH-associated genes, i.e. MYO7A and USH2A. In our cohort of 76 USH patients, CML rate was found to be 37 %, while in MYO7A was of 45 % and USH2A was of 29 %.