Differential diagnosis<unk>  symptoms are often missed in<unk> , either because patients do not think their symptoms are abnormal or they attempt to conceal their symptoms from others. On the other hand,<unk>  may be confused with schizoaffective disorder. Due to overlapping symptoms, differential diagnosis includes also dissociative disorders.
Psychotic depression
Depression 
Double depression
Collective depression
Retarded depression
Late life depression
Masked depression
Melancholic depression