The der(1;7) is characterized by a greater male preponderance, marked thrombocytopenia, higher HB, lower ANC, and lower blasts in MDS, with more sole aberration existence and co‐occurrence of +8 in karyotype, and with higher frequencies for RUNX1, ETNK1, and EZH2 mutations. The gene discussed is EZH2; the disease is myelodysplastic syndrome.