[Bullous pemphigoid induced by photochemotherapy of psoriasis. Apropos of 2 cases, with a review of the literature].

PUVA-induced generalized bullous pemphigoid is reported is 8 patients with psoriasis and compared with the bullous pemphigoid described in 25 patients treated by other techniques (Goeckerman, UVB, anthralin, sun exposure, topical steroids). Furthermore they must be differentiated from all the other types of bullae induced by photochemotherapy in psoriatic patients. Diagnostic criteria should be improved in order to allow a better classification of these bullous diseases and to separate the photo-toxic bullae which are the commonest, from other bullae such as epidermolysis bullosa acquisita, localized bullous pemphigoid and drug-induced bullous pemphigoid.