Wernicke's encephalopathy--prevalence and clinical spectrum

Area of Science:

• Neurology
• Nutritional Neuroscience
• Alcohol-Related Disorders

Background:

• Wernicke's encephalopathy (WE) is a preventable neurological disorder.
• It is frequently undiagnosed in individuals with alcohol use disorder.
• Autopsy studies reveal a 2% prevalence in the US and Australia, and 0.6%-0.8% in Oslo.

Purpose of the Study:

• To highlight the high prevalence and low clinical diagnosis rate of Wernicke's encephalopathy.
• To describe the acute and chronic clinical presentations of WE.
• To emphasize the wide spectrum of symptoms and its impact on diagnostic accuracy.

Main Methods:

• Analysis of unselected autopsy materials from the United States, Australia, and Oslo, Norway.
• Comparison of autopsy-diagnosed cases with clinically diagnosed cases.
• Review of clinical symptoms associated with both acute and chronic forms of WE.

Main Results:

• WE is found in 0.6%-2% of autopsy cases, with only 1%-20% diagnosed clinically.
• One-third of cases presented acutely with stupor and coma, contrary to classical descriptions.
• Chronic cases exhibited a wide range of symptoms, from severe dementia to mild memory reduction.

Conclusions:

• Wernicke's encephalopathy is a common, underdiagnosed condition in alcoholics.
• The diverse clinical presentation, including stupor and coma in acute cases, challenges classical understanding.
• Improved awareness of the broad symptom spectrum is crucial for enhancing diagnostic accuracy.