Involutional melancholia

Nature

Involutional melancholia or involutional depression is a traditional name for a supposed psychiatric disorder which was thought to affect mainly elderly or late middle-aged people, often in association with paranoia.

As with other historical descriptions of melancholia, this diagnostic label is not recognized as a psychiatric disorder by the DSM-5, the American Psychiatric Association's (APA) classification and diagnostic tool.

Source: Wikipedia

Type 
(G) Very specific problems