Regarding platelet count that was significantly lower in those with higher PD‐1 expression, a study done by Elif et al [16] who measured serum PD‐1 and PD‐L1 in patients with idiopathic thrombocytopenic purpura (ITP) revealed that there was a positive correlation between serum PD‐1 levels and platelet count, which needs further studies to correlate serum PD1 and platelet count in AML patients. This evidence concerns the gene PDCD1 and thrombocytopenic purpura.