Distribution of total CD34⁺ HPC and MC-committed CD34⁺ precursors in the blood of patients with MCAS and different diagnostic categories of mastocytosis according to the absence or presence of CTMCs in blood. (A-C) HPSCs and (D-I) MC-committed CD34⁺ precursors in the blood of patients with MCAS or different diagnostic categories of mastocytosis, according to the absence or presence of CTMCs in blood. HPSCs, hematopoietic precursor and stem cells.