[Unusual side effects in patients with psoriatic erythroderma treated with etretinate (RO 10-9359)]

The results of the treatment of psoriatic erythroderma are variable in different references. The authors describe the treatment of three patients and emphasize the immuno-modulatory action of etretinate on polymorphonuclears, monocytes and Langerhans cells and the possibility of an action on prostaglandins.