Starting from a number of remarks and hypotheses of authors such as Georg Groddeck, Sigmund Freud, Jacques Lacan, Jean Guir and Colette Soler about the entanglement of psyche and body, which, amongst other things, manifests itself in the activation of latent genes under the influence of specific signifiers, the author explores the influence of the signifier on the development of the shape of the body. Her analytical practice led her to hypothesize that some aspects of the body – mainly those that carry an erotic meaning – are marked by the signifier in the development of their shape, according to an analogous structural dynamic such as those that occur in psychosomatic phenomena. This hypothesis about the “morphogenesis” of the body is illustrated using a number of brief clinical fragments. One particular case highlights how a woman, in order to satisfy the desire of her mother for a son, unconsciously tries to become a man via a body dysmorphia, which manifests itself in the real of the body via deregulation, increased height, and acromegalia, which results in the body taking on a male shape.