Cutaneous Manifestations in Hereditary Alpha Tryptasemia.

Hereditary alpha tryptasemia (HaT) is a recently identified disorder that is associated with dermatologic manifestations such as urticaria, flushing, pruritus, and atopic dermatitis (AD), as well as a broad range of other symptoms affecting multiple systems. Given the potential cutaneous manifestations and the fact that dermato-logic symptoms may be the initial presentation of HaT, awareness and recognition of this condition by dermatologists are essential for diagnosis and treatment. This review aims to summarize cutaneous presentations consistent with HaT and various conditions that share overlapping dermatologic symptoms with HaT.