[Current status of late onset delusion in the elderly].

In the field of chronic delusions, authors make synthesis of the delusion with late emergence in the elderly. This delusion is at once replaced in the history of its nosographic position, then defined in its presentation. The question of its refer with depression and its place in the limits of dementia are approached. Authors outline the importance of biological, psychological and sociological factors in induction of this particular delusion to clarify the means for its management.