Psychiatric syndromes other than dementia

Karl Bechter1, Florian Deisenhammer2

  • 1Clinic for Psychiatry and Psychotherapy II, Ulm University, Bezirkskrankenhaus Günzburg, Günzburg, Germany.

Summary

This review explores how psychiatrists use cerebrospinal fluid (CSF) diagnostics in evaluating patients with severe mental illness (SMI). It finds that there is no agreement on when or how often to perform CSF tests in psychiatric patients. Some experts recommend routine CSF testing for new-onset SMI, especially in schizophrenia spectrum disorders, while others rarely perform the test and refer patients to neurology. The study highlights that minor neurological signs are common in SMI, but there are no clear guidelines for when to conduct CSF evaluations. Recent research suggests that minor CSF abnormalities may be important in differential diagnosis, particularly in distinguishing between psychiatric and autoimmune neurological conditions. Case reports show that some patients diagnosed with psychiatric disorders were later found to have neurological conditions based on CSF findings. The authors conclude that CSF diagnostics may be underutilized in psychiatry and that further research is needed to clarify their role in diagnosing SMI.

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