»Since reaching puberty, Aurélie has been invaded by paedophilic and sadistic fantasies ; after having contained them in her imagination for years, she has just acted upon them. As a parallel to this, everything that she presents during the session and elsewhere has an inflexibly labile character. Her psychopathological characteristics bear witness to a recurrent danger of psychotic disorganisation and are situated in the register of pubertaire psychosis. This clinical vignette offers an opportunity to discuss the link between perversion « and psychosis in puberty.»