CORRÊA, A. Psicodrama, Walter Trinca e adolescentes: a utilização do psicodrama como instrumento no desenvolvimento de um diagnóstico – Estudo de Caso [Psychodrama, Walter Trinca and adolescents: the use of psychodrama as a tool in the development of a diagnosis – Case Study]. (Curso de especialização) – Associação Brasileira de Psicodrama e Sociodrama (ABPS). São Paulo, 1997. Abstract: By reference to a clinical case from her work involving teenagers, the author shows how Psychodramatic techniques may enhance the results obtained for a diagnosis, even if a projective production is the initial technique applied. Based on this procedure, the author points out that at this moment the interpretation exclusively made by the therapist gives room to the patient’s psychodramatic insight, consisting of a deep emotional perception of a situation which had so far remained obscure.