This article presents the case of Marie, an adolescent hospitalized in the Adolescent Crisis Ward in Geneva, for whom it was decided to introduce a treatment by packs. This technique is part of a therapeutic approach using corporal mediation. Initially intended for patients with psychotic disorders, its was gradually extended to include situations where there is an alteration of body image in association with various types of pathology. For Marie, the treatment indication was based on an hypothesis of basic narcissistic fragility, linked with a primary lack of mothering and of protective shields.