ZMYM2 and myeloproliferative disorder: ZMYM2, which is FGFR1 (fibroblast growth factor receptor 1) is one of the most common chaperones, and patients with ZMYM2-FGFR1 fusions frequently present with myeloproliferative neoplasms and T-lymphocytic lymphomas (Katoh, 2016; Montenegro-Garreaud et al., 2017).