• Erik Oudman, Jan W Wijnia, Misha J Oey, Mirjam van Dam, and Albert Postma.
• Experimental Psychology, Helmholtz Institute, Utrecht University, the Netherlands; Slingedael Korsakoff Center, Lelie Care Group, Rotterdam, the Netherlands. Electronic address: e.oudman@leliezorggroep.nl.
• Nutrition. 2021 Jun 1; 86: 111182.

AbstractCrohn's disease (CD) and ulcerative colitis (UC) are chronic and debilitating inflammatory conditions of the gastrointestinal tract. Thiamine can deplete rapidly in CD and UC, which can lead to Wernicke's encephalopathy (WE), is an acute neurologic disorder. Our objective was to systematically review the presentation of WE in CD and UC. We conducted our search from inception using the MeSH terms "Crohn's disease," "ulcerative colitis," and "Wernicke's encephalopathy." Our search yielded 28 case studies reporting on 31 cases. CD was diagnosed in 21 cases, and UC in 10. The first signs of WE were nausea and vomiting (13 cases), double vision (10), blurred vision (10), and hearing loss (4). In 12 cases, partial or complete bowel resection was one of the etiologies of thiamine depletion. In nine cases, thiamine was not supplemented intramuscularly or intravenously while parenteral nutrition or glucose was given to the patient. In 10 cases, detailed descriptions of thiamine treatment were given. Thiamine treatment at suboptimal levels (7 of 10 cases) turned out to lead to residual cognitive deficits in three cases. In three cases with optimal treatment (1500 mg/d intravenously), complete remission of WE symptoms was achieved. Rapid treatment with high doses (500 mg, 3 times/d) of thiamine saves lives, and treats WE in its core symptomatology.Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.

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