Wernicke's encephalopathy after gastric partitioning for morbid obesity.

Two weeks after gastric partitioning for morbid obesity, a 45-year-old woman experienced persistent vomiting that led to a weight loss of 30 kg over 6 weeks. Wernicke's encephalopathy and peripheral neuropathy developed. The Wernicke's encephalopathy responded well to the administration of thiamine. This is one of very few reported cases of Wernicke's encephalopathy following gastric partitioning.