Thiamine deficiency is most closely associated with which two related conditions?

• A. Wernicke encephalopathy and Wernicke-Korsakoff syndrome
• B. Delirium tremens and withdrawal
• C. Hepatic encephalopathy and hepatic coma
• D. Nicotine withdrawal and anxiety

Answer: (A)

Thiamine (vitamin B1) is essential for brain energy production. When thiamine is deficient, brain cells struggle to generate enough energy, with certain regions like the mammillary bodies being especially vulnerable. This sets the stage for Wernicke encephalopathy, an acute and potentially reversible condition marked by confusion, eye movement problems, and ataxia. If not treated promptly, it can progress to Korsakoff syndrome, a chronic amnestic disorder characterized by severe memory deficits and confabulation. Together, these two stages are often described as Wernicke-Korsakoff syndrome, reflecting how a thiamine deficiency can initiate an acute event and, if untreated, evolve into a lasting cognitive disorder. The other options describe problems tied to alcohol withdrawal or liver failure rather than thiamine deficiency itself. A practical clinical note: in suspected thiamine deficiency, give thiamine before glucose to prevent precipitating Wernicke encephalopathy.