[Why and how to assess older people with cancer?].

The older population accounts for almost 60% of new cancers. Their management is a public health problem and is complex. It raises different questions: Is the patient's prognosis linked to cancer or another pathology? The heterogeneity of this population emphasises the importance of the overall condition assessment, in particular to avoid over-treatment (or under-treatment), and to be able to identify frail or vulnerable elderly patients who are at risk of having more treatment toxicities. Through this article, we will recall the importance of geriatric in-depth evaluation (EGA) by detailing the different factors that impact the therapeutic decision, tolerance to treatments… This EGA is however time-consuming and not all patients can be evaluated. In order to identify the subjects covered by this EGA, screening scales have been developed. Finally, we will develop the place of research in oncogeriatric management.