Hereditary alpha tryptasemia and clinical implications

Figure 2 Relationship. The relationship between hereditary alpha tryptasemia (HAT), systemic mastocytosis, hymenoptera venom anaphylaxis and mast cell activation syndrome. A: The relationship between HAT, systemic mastocytosis, and hymenoptera venom anaphylaxis; B: Relationship between hereditary alpha tryptasemia and mast cell activation syndrome. HAT: Hereditary alpha tryptasemia; HVA: Hymenoptera venom anaphylaxis; MCAS: Mast cell activation syndrome; MMAS: Monoclonal mast cell activation syndrome; SM: Systemic mastocytosis; CM: Cutaneous mastocytosis.