Solar Urticaria and Disturbed Metabolism of Porphyrins

Abstract

We report on a case of solar urticaria with elevated protoporphyrin in the stool. No other evidence for an erythropoietic protoporphyria could be found.

Solar Urticaria

“…Unlike solar urticaria, the lag time for the appearance of polymorphous light eruption varies between 2 hours and 3 days after sun exposure,and,intheabsenceoffurtherexposure,itgenerallytakes 2 to 6 days or even longer before the lesions disappear. Solar urticaria also has to be differentiated from erythropoietic protoporphyria, 2 in which sun-induced urticaria can be one of the symptoms. Erythropoietic protoporphyria usually starts in infancy, is often familial, and has skin pain as…”

Lichturtikaria

“…Bei der erythropoetischen Protoporphyrie sind gelegentlich urtikarielle Sofortreaktionen das führende Symptom [3,5,53]. Dabei klagen die Patienten meist über Brennen,jedoch nicht über Juckreiz.…”