We could hypothesize that this entity behaves in a similar way as the disorders with FGFR1 rearrangements and myeloid hyperplasia, eosinophilia, and lymphoblastic lymphoma, but further studies should be pursued aiming to identify other genes involved in this translocation and the underlying mechanism that leads to eosinophilia. The gene discussed is FGFR1; the disease is lymphoblastic lymphoma.