Translocation t(1;9) is a recurrent cytogenetic abnormality associated with progression of essential thrombocythemia patients displaying the JAK2 V617F mutation.
Leon A, Staropoli JF, Hernandez JM, Longtine JA, Kuo FC, Dal Cin P. Translocation t(1;9) is a recurrent cytogenetic abnormality associated with progression of essential thrombocythemia patients displaying the JAK2 V617F mutation. Leuk Res. 2011 Sep; 35(9):1188-92.