Intense nihilism, somatization and agitation in old age are the hallmark symptoms of -

Involutional melanocholia has following featurs i)    Involutional (old) age group ii) Melanocholia (multiple somatic symptoms → somatization) iii) Psychomotor agitation / Retardation iv) Psychotic features (delusion of nilism, guilt, perseution, Hypochondriacal; Hallucinations). Atypical depression is characterized by increased appetite / increased weight, increased sleep (hypersomnia), Lethargy, Rejection sensitivity. For somatized depression see a previous explanation. Depressive stupor occurs in the severe depression where the person is akinetic (immobile) and mute.