Treatment of pityriasis rubra pilaris with an oral aromatic retinoid (RO 10--9359).

A patient with widespread PRP was first treated with an oral aromatic retinoid (RO 10--9359) and PUVA in successive periods. Retinoid treatment resulted in marked improvement but during PUVA treatment the disease became re-activated. The patient was finally treated with aromatic retinoid alone, which brought the disease to remission in 6 weeks.