Clinical findings of these patients were compared to those of previously reported cases, and the possible clinical and biological similarities between ETV6/ABL1 and other fusion genes leading to increased tyrosine kinase activity are discussed..     ///    Molecular cytogenetic analysis confirmed that formation of an ETV6/ABL1 fusion in these patients required at least three chromosomal breaks and showed that each of these translocations is the result of a complex chromosomal rearrangement.     ///    "To date, ETV6/ABL1 transcripts have been detected in only four patients with a leukemic disorder. "    ///    "Here, we describe one adult with chronic myeloid leukemia and a child with T-cell acute lymphocytic leukemia with ETV6/ABL1. "    ///    Molecular cytogenetic and clinical findings in ETV6/ABL1-positive leukemia.. 