Case Report: Cotard's Syndrome in Anti-N-methyl D-aspartate (NMDA) Receptor (Anti-NMDAR) Encephalitis

Abstract

Cotard's syndrome is uncommon psychopathology among patients with psychotic illnesses. Limited cases had been reported regarding the occurrence of this syndrome in anti-NMDAR encephalitis which itself is a relatively new disease that often presents with florid psychotic symptoms. This poses difficulties in differentiating it from a primary psychiatric illness. Late recognition of anti-NMDAR encephalitis can lead to death as it can progress to autonomic instability in its natural course of illness. We report a patient who first presented with psychotic symptoms with initial negative findings from baseline investigations. Further investigation revealed anti NMDAR antibodies in the cerebrospinal fluid. Prompt treatment was initiated and despite early poor response to the first-line treatment with the development of allergic reaction, our patient recovered completely after 1 month of hospitalization. This case report aims to highlight the importance of early detection of anti-NMDAR encephalitis and the possibility of uncommon psychopathology such as Cotard's syndrome occurring in this disease.

You are already dead: Case report of nihilistic delusions regarding others as one representation of Cotard's syndrome

“…Notably, the patient's nihilistic delusions developed from her various cenesthetic hallucinations with delusional descriptions. In some case reports of Cotard's syndrome, the patients exhibit several related symptoms, such as the belief that they have no family members, their doctors do not exist, their children are dead, and everyone around them is dead 2,5–7 . However, the prevalence of these related symptoms is not well understood, and these types of nihilistic delusions regarding others have been neglected compared to nihilistic delusions regarding self.…”