[Psoriasis and bullous dermatoses].

In the last five years we observed in Berlin seven cases of psoriasis vulgaris combined with bullous eruptions of the pemphigoid type. Exogenious factors provoking the bullous eruptions were sun exposure, photochemotherapy and treatment with dithranol. These factors did not cause contact allergy of type IV, but pemphigoid eruption which could be characterised by immunfluorescence. This, was accompanied in two cases with high numbers of eosinophils in tissue and blood. The results show similarities with the findings of Person and Rogers who have shown the manifestation of otherwise subclinical pemphigoid in patients being treated for psoriasis.