[Late life psychotic disorders : clinical aspects].

Old age is a vulnerable period of life for either the apparition or the exacerbation of psychiatric disorders. Among others, psychoses are relatively frequent in the elderly. Alas diagnoses of non-organic psychoses are still matters of debate, namely because of the important variability of symptoms and the lack of data in the elderly population. DSM-5 adds only little precision to this nosographic issue. These questions are however important in practice, since they influence prognostic aspects and treatment choices. Thus diagnostic criteria and care remain complex. The present article summarizes these clinical aspects for the most frequent forms of late life psychoses, namely early- and late-onset schizophrenia and delusional disorder.