Autoimmune Encephalitis Case Had Agitation Unresponsive to Benzodiazepines

Lack of sedative response can coexist with a treatable neurological cause of psychiatric-appearing symptoms.

What the publication shows

The report described a patient with lymphoma, memory disturbance, hallucinations and agitation that did not respond to benzodiazepines and neuroleptics. Later cerebrospinal-fluid antibody findings supported mGluR5-associated encephalitis. Improvement followed corticosteroid treatment, despite relatively unrevealing routine imaging and EEG.

Limits of the evidence

A single case cannot establish the diagnostic accuracy of medication nonresponse or imply that every refractory agitation episode is autoimmune. The sequence included multiple investigations and treatments. A normal routine test does not independently exclude every encephalitic syndrome.

Application to expert review

For record review, examine the evolving cognitive features and medical context rather than labeling nonresponse as behavioral resistance. Distinguish symptom-directed sedation from treatment of the underlying process. Neither benzodiazepine response nor nonresponse substitutes for the broader neurological evaluation.

Source and related reading

Source: Publication PMC6230718. The case-review applications above are interpretive analysis.