A case of annular erythema of infancy accompanied by elevated tryptase

Abstract

Annular erythema of infancy (AEI) is characterized by self‐limited eruptions of erythematous, annular to polycyclic patches and plaques, the etiology of which is thought to involve a hypersensitivity reaction to an unknown antigen. We present a case of AEI mistaken for systemic mastocytosis due to elevated serum tryptase. We were unable to find prior reports of an association between AEI and elevated tryptase in the literature.