Bullae on the extremities of a newborn: A case of diffuse cutaneous mastocytosis mimicking epidermolysis bullosa.

Mastocytosis is an uncommon disorder characterized by clonal proliferation of mast cells in one or more organs, including cutaneous mastocytosis limited to the skin and systemic mastocytosis involving the bone marrow, liver, spleen, or lymph nodes(1) . Diffuse cutaneous mastocytosis (DCM) is a rare variant of cutaneous mastocytosis with an incidence of 3.57%-5.2%(2-3) . DCM often occurs with bullae on the skin, which can lead to misdiagnosis with other bullous diseases. We report a case of DCM mimicking epidermolysis bullosa.