A case of co-incident phenylketonuria, pemphigus foliaceus, and tinea amiantacea treated with tetracycline and nicotinamide.

I report a patient with phenylketonuria who presented with pemphigus foliaceus or tinea amiantacea. The rash resolved with treatment with tetracycline and niacinamide. This article outlines the uses and mechanisms of this therapy with particular attention to its use in pemphigus, treatments, and scalp findings of pemphigus foliaceus and the dermatological manifestations of PKU.