Acquired self-healing Blaschko dermatitis in an adult

A 24-year-old woman with a 3 year history of Blaschkitis is presented. The dermatosis consisted of erythematous vesicular papules following Blaschko's lines on her left trunk. A moderate itching was described by the patient initially. Resolution occurred spontaneously after 3 months with hypopigmentation. Histological examination demonstrated a perivascular inflammatory infiltrate in the subpapillary dermis with lymphocytic exocytosis.