Solar urticaria: A case with increased skin mast cells and good therapeutic response to an antihistamine

Abstract

A 45-year-old woman with solar urticaria is described. She was found to have: (a) increase of skin mast cells; (b) good therapeutic response to hydroxyzine hydrochloride; (c) frequent peptic ulcers of the stomach; (d) antinuclear IgM antibodies in a titer of 1:1000; (e) cold urticaria and dermographism; (f) anamnestically, suppression of the solar urticaria by a sequential oral contraceptive.