Psychiatric diagnosis is based on clinical manifestations; those are the consequences of patient's inner state, their life situation, the evolution of the disease but also the response to our clinical actions. To this day, there are few objective clinical data to help establish a diagnosis, therefore, psychiatry diagnosis is mainly based on diagnostic criteria like DSM and ICD-10. The DSM frames entities by their diagnostic stability, however there are several causes for variability categorized by Spritzer et al. (1987): subject variance (changing in patients), occasions variance (different episodes), information variance (new information) and observation variance (different interpretations).The main objective is to determine the long term diagnosis stability of patients with psychotic or affective disorders among readmitted patients at our Psychiatric Unit.To understand to what extent do our patients diagnosis evolve and in what way.Retrospective analysis of the diagnosis of patients with affective or psychotic disorders who have readmissions to our unit. We have a study sample of 210 patients that meet our criteria in a 30-month frame.Although data are still being analyzed, we are now aware that our Inpatient Unit has a high rate of readmission of patients with these diagnoses. It is clear that for many of these patients, diagnosis must be seen as a guidance rather than a label.Knowing our own data can make us aware that a transversal look at patients can be insufficient and only time can determine a closed diagnosis.