CSF3R and chronic myelomonocytic leukemia: In particular, we found 2 (7.4%) patients with CMML who harbored CSF3R mutations, one had CSF3R T618I missense variant (CMML#14) in exon 14 with 12.1% allele frequency and the other (CMML#15) two mutations, CSF3R M696T missense in exon 17 and CSF3R P146Rfs*3 frameshift variant in exon 5, both with 49.7% allele frequency.