[Successful use of isotretinoin in type Zumbusch generalized pustular psoriasis following recovered etretinate-induced hepatitis].

Administration of etretinate in a 29-year-old female patient suffering from severe pustular psoriasis caused a dramatic increase in liver enzymes. Liver biopsy revealed changes characteristic for drug-induced hepatitis. After normalization of liver parameters following withdrawal of etretinate, isotretinoin was administered during a severe pustular relapse. In contrast to etretinate, isotretinoin was well tolerated and resulted in a good therapeutic response. Thus, isotretinoin can be considered as an effective and safe therapeutic alternative for pustular psoriasis even after the occurrence of etretinate-induced hepatitis.