After 10 days, Mr. E was discharged home from the medicine service with no clear cause of his AMS.
Table 1
Suggested workup for altered mental status
| Complete blood count, basic metabolic profile, creatine kinase |
| Thyroid-stimulating hormone, thyroid scan |
| Vitamin B12, folate, thiamine |
| Blood alcohol, urine drug screen |
| Urine analysis and cultures |
| Lumbar puncture—CSF staining and cultures |
| Chest radiography |
| CT and MRI scan of brain |
| Electroencephalography |
| Neuropsychiatric testing |
| CSF: cerebrospinal fluid Source: Reference 6 |
EVALUATION: Worsening behavior
One week later, Mr. E presents to the ED with continued AMS and worsening behavior at home. Two days ago, he attempted to strangle his dog and cut himself with a knife. His paranoia was worsening and his oral intake continued to decrease. In the ED, Mr. E does not want a chest radiograph because, “I don’t like radiation contaminating my body”; his family stated that he had been suspicious of radiography all of his life. He receives empiric ceftriaxone because of a possible urinary tract infection. Urine culture is positive for Pseudomonas aeruginosa and he is switched to ciprofloxacin. Mr. E is admitted for further workup.
Mr. E’s mother states, “I think this change in behavior is related to my son drinking alcohol for 20 years. This is exactly how he acted when he was on drugs. I think he is having a flashback.” She also reports her son purchased multiple chemicals—the details of which are unclear—that he left lying around the house.
His wife says that after discharge a week ago, Mr. E was stable for 1 or 2 days and then “he started going downhill.” He became more paranoid and he started talking about cameras watching him in his house. Mr. E took quetiapine, 50 mg/d, for a few days, then refused because he thought there was something in the medication. Mr. E’s family feels that at times he is responding to internal stimuli. He makes statements about his DNA being changed and reports that he has 2 wives and the wife in the room was not the real one, which suggests Capgras syndrome. His wife provides a home medication list that includes vitamin B complex, vitamins B12, E, and C, a multivitamin, zinc, magnesium, fish oil, garlic, calcium, glucosamine, chondroitin, herbal supplements, and gingko. The psychiatry team recommends switching from quetiapine to olanzapine, 15 mg/d, because Mr. E was paranoid about taking quetiapine.
We determine that Mr. E does not have medical decision-making capacity.
Because his symptoms do not improve, Mr. E is transferred to the psychiatric intensive care unit. His mental status shows little change while there. Neuropsychiatric testing shows only “cognitive deficits.” He shows signs consistent with neurologic dysfunction in terms of stimulus-bound responding and perseveration, which is compatible with the bilateral basal ganglia lesion seen on MRI. However, some of his behaviors suggest psychiatric and motivationally driven or manipulative etiology. During this testing he was difficult to evaluate and needed to be convinced to engage. At times he was illogical and at other times he showed good focus and recall. It is difficult to draw more definitive conclusions and Mr. E is discharged home with minor improvement in his symptoms. He didn’t attend follow-up appointments. During a courtesy call a few months after his admission, his wife revealed that Mr. E had died after shooting himself. It is unclear if it was an accident or suicide.
The authors’ observations
Mr. E’s diagnosis remains unclear (for a summary of his clinical course, see Table 2). Although his initial presentation was consistent with delirium, the lack of an identifiable medical cause, prolonged time course, and lack of improvement with dopamine blocking agents suggest additional diagnoses such as Wernicke-Korsakoff syndrome, rapidly progressive dementia, or a substance-induced disorder. He displayed paranoia and bizarre delusions, which would suggest a thought disorder. However, he also had a history of substance use. A few months after we saw Mr. E, “bath salt” (methylenedioxypyrovalerone) abuse gained national attention. Patients with bath salt intoxication present with confusion, paranoia, and behavioral disturbances as well as a prolonged course.8
Mr. E’s CT and MRI scans, history of alcohol use, and cirrhosis also point to Wernicke-Korsakoff syndrome as an underlying diagnosis. It is unclear whether Mr. E experienced alcohol withdrawal and IV glucose without adequate thiamine replacement during a prior surgery. However, MRI findings were unchanged from a previous study 10 years ago.