Two sisters with impetigo herpetiformis

Two sisters (non-twins) had impetigo herpetiformis triggered by their first pregnancy. One sister treated with etretinate had good resolution of skin disease. Impetigo herpetiformis is probably a variant of pustular psoriasis and may be provoked or precipitated by factors, such as pregnancy. Both patients shared common HLA antigens (All, AW24, BW44, BW54 and DR6Y).