David R. Spiegel

Cobalamin deficiency has hematologic, neurologic, and psychiatric sequelae. This report describes a patient with no prior psychiatric history but with past history of total gastrectomy who developed mania.

Peduncular hallucinosis (PH), an uncommon cause of hallucinations, is typically due to lesions of rostral brainstem or diencephalon. This report describes a case of PH due to right pontine/cerebral...

As both delirium and short-term memory impairment can be presenting symptoms in both Wernicke-Korsakoff syndrome and antibody-mediated limbic encephalitis, the potential of misdiagnosis and delayed treatment can occur. Read...

This report describes a case of Balint syndrome that followed left basal ganglia hemorrhagic stroke.

Delirious mania is a potentially life-threatening but underrecognized neuropsychiatric syndrome. Here, read about a patient whose symptoms were consistent with nonmalignant delirious mania and were successfully treated with lorazepam...

A patient with secondary adrenal insufficiency and no psychiatric history developed a psychotic episode after a positive test for severe SARS-CoV-2. Read on to find out more about this...

Here, the authors present the case of a patient with stabilized schizophrenia who had previously received a renal transplant and subsequently acquired COVID-19. They highlight how each of the...