The revue Adolescence has also been a place of controversy. Through these controversies, the issue of the continuity of therapeutic work in the clinical field of adolescence has been the aim. The confrontation of different ways of thinking provided an indispensable context for the reworking of notions that clinical practice cannot confirm once and for all. This subject is treated with reference to two colloquia, one on homosexuality, the other on psychosis in adolescence. Calling upon authors both from the field of adolescence and the more restricted field of the revue, we complete this overview of notions of controversy and engagement. It is through these that issues of the therapist’s technical and personal values will also be evoked.