Most malignant type of pustular psoriasis is ?

Ans. is'd'i.e., Von Zumbusch typeVon Zumbusch type of pustular psoriasis is the suddenly developing most serious type, characterized by severe systemic upset, swinging pyrexia, ahralgia and high polymorphonuclear lymphocytes.The skin first becomes erythrodermic and then develops sheets of sterile pustules over trunk and limbs.Pustules become confluent to from "lakes of pus".