A medical algorithm for Cotard delusion based on more than 300 literature cases

Area of Science:

• Psychiatry
• Neurology

Background:

• Cotard delusion (CD) is a rare psychiatric disorder characterized by nihilistic delusions regarding one's own existence.
• The rarity and potential for underdiagnosis complicate systematic approaches and clinical management.
• Existing literature predominantly comprises case studies, hindering comprehensive understanding.

Purpose of the Study:

• To conduct a literature review on Cotard delusion.
• To propose an algorithm for differential diagnosis and management of CD.
• To provide clinical guidance for healthcare professionals encountering this condition.

Main Methods:

• Extensive literature research across multiple bibliographic databases.
• Cross-referencing of references to identify all available peer-reviewed works on CD.
• Synthesis of data from 328 reported cases.

Main Results:

• Identified 328 cases of Cotard delusion in the literature.
• Reported various treatment modalities, including pharmacotherapy (antipsychotics, antidepressants) and electroconvulsive therapy.
• Demonstrated that CD symptoms can be improved with available treatments.

Conclusions:

• Cotard delusion, despite diagnostic challenges, is a treatable condition.
• The proposed algorithm and literature synthesis serve as a valuable tool for clinicians.
• Increased awareness and systematic approaches can improve patient outcomes for CD.