Involvement of patients in decision-making about their health has been promoted nationally and internationally since several years. Despite this, patient (and their relatives) participation remains insufficient and one of the objectives of the current French national cancer policy (Plan cancer 2014-2019) is to give everyone the possibility to play an active role in the management of their care. This overview focuses on decision-making autonomy of cancer patients through two main questions: why and how to promote it? After a brief review of the decision-making models described in the literature in the past decades insisting on the major role of the decisional context and the dynamic character of this context, this article presents a selection of published works which aimed to respond to those 2 questions.