IKZF1 and neoplasm: Notably, the deconvolution of immune cells showed that the native B cells, T cells regulatory (Tregs), neutrophils and eosinophils were significantly higher in IKZF1 N159S‐positive AML, which may be associated with the blocked differentiation of B lymphocytes and specific regulation of microenvironment by IKZF1‐positive tumour cells (Figure S4).