PODOPHYLLIN (resin of podophyllum N.F.), an extract of the dried rhizome and roots of the May apple, or mandrake, has been employed for more than one hundred years as a laxative and more recently as a supposed liver stimulant. In 1942, Kaplan<sup>1</sup>reported successful results in the treatment of condyloma acuminatum with topical application of a 25 per cent suspension of podophyllin in liquid petrolatum. The rapid involution of the condylomas was assumed by Culp and Kaplan<sup>2</sup>to be due to spasm of the small vessels induced by the irritant action of the drug, with resultant ischemia and necrosis. However, the histologic studies of treated lesions by Sullivan and King<sup>3</sup>suggested a different mode of action. They found that 24 to 48 hours after application of podophyllin the epidermis showed two types of change: superficially there was loss of intercellular bridges with accentuation