JAK2 and primary cutaneous T-cell non-Hodgkin lymphoma: However, the PCM1-JAK2 fusion which was reported in a patient with peripheral T-cell lymphoma [15], the amplification of JAK2 which was found in 12.5% of cutaneous T-cell lymphomas [23], and the present ATXN2L-JAK2 fusion gene indicate that JAK2 is recurrently involved in T-cell lymphomagenesis albeit at as yet unknown frequency.