IGHG3 and cutaneous mastocytosis: Significantly lower prevalence of anti- MSP-1f30 and MSP-1f42 IgG1 (p < 0.05), anti- MSP-1d83, MSP-636 and MSP-722 IgG3 (p < 0.05) and anti- MSP-1d38 and MSP-636 IgG2 (p < 0.05) were observed in CM patients compared to MM patients.