<unk> 's<unk> , also known as walking corpse syndrome or<unk> 's syndrome, is a rare mental disorder in which the affected person holds the<unk> al belief that they are dead, do not exist, are putrefying, or have lost their blood or internal organs. Statistical analysis of a hundred-patient cohort indicated that denial of self-existence is present in 45% of the cases of<unk> 's syndrome; the other 55% of the patients presented with<unk> s of immortality. In 1880, the neurologist Jules<unk>  described the condition as ("The Delirium of Negation"), a psychiatric syndrome of varied severity. A mild case is characterized by despair and self-loathing, while a severe case is characterized by intense<unk> s of negation and chronic psychiatric depression. The case of "Mademoiselle X" describes a woman who denied the existence of parts of her body and of her need to eat. She said that she was condemned to eternal damnation and therefore could not die a natural death. In the course of suffering "The Delirium of Negation", Mademoiselle X died of starvation.<unk> 's<unk>  is not mentioned in either the Diagnostic and Statistical Manual of Mental Disorders (DSM) or the 10th edition of the International Statistical Classification of Diseases and Related Health Problems (ICD-10) of the World Health Organization.
Cotard delusion
Fregoli delusion
Capgras delusion
Monothematic delusion
Homicidal ideation
Pectoriloquy
Persecutory delusion
Grandiose delusions