Brain MRI detection of early Wernicke's encephalopathy in a hemodialysis patient

Wernicke’s encephalopathy should be suspected in hemodialysis patients with appetite loss alone, with careful brain MRI analysis for detecting possible Wernicke’s encephalopathy at an early stage.

Wernicke’s Encephalopathy with Normal Neuroimaging - Suspect and Treat - A Case Report

Wernicke’s encephalopathy (WE) is an unrecognized nutritional deficiency which often goes unnoticed. WE is clinically often composed of a triad including nystagmus, ophthalmoplegia and altered mental status. Although this triad practically is present only in a handful of cases1 it is also described as an acute neuropsychiatric presentation of thiamine deficiency. Early diagnosis and prompt treatment are of utmost importance here as it can prevent chronic brain damage which is often the end effect of thiamine deficiency. Wernicke’s encephalopathy is most commonly found in patients with chronic alcoholism, less frequent in non-alcoholic patients. In non-alcoholic patients, Wernicke’s encephalopathy might develop due to erosion of upper portion of gastrointestinal tract or secondary to intractable vomiting, inadequate dietary intake or malabsorption. Other causes include malignancies (gastric cancer, leukaemia, lymphoma), hyperemesis, anorexia, thyroid conditions.1,2 Wernicke’s encephalopathy is caused due to thiamine (B1) deficiency. B1 is a water-soluble vitamin which acts as a co-factor for carbohydrate metabolism. It is also important for neuronal cell function.2 This vitamin can’t be synthesised in the human body and thus dietary intake play a very important role. Symptoms of thiamine deficiency Include - Nystagmus, ataxia, encephalopathy, mental confusion. Early onset includes symptoms like: - headache, irritability, fatigue and abdominal discomfort. Prophylactic thiamine supplementation forms a major treatment for patients at risk for developing refeeding syndrome (RFS). RFS is an underdiagnosed condition which is characterised by potential shift in the fluid and electrolytes.

Atypical neuroleptic malignant syndrome and non-alcoholic Wernicke’s encephalopathy

We report the case of a middle-aged woman with a history of bipolar disorder, in the absence of alcohol or substance misuse. The patient had been maintained on fluphenazine decanoate depot and now presented acutely with cognitive dysfunction and rigidity. Laboratory tests revealed elevated creatine kinase, acute kidney injury with metabolic acidosis and transaminitis, leading to a provisional diagnosis of neuroleptic malignant syndrome (NMS). Neuroleptics were withheld; dialysis was commenced; and blood biochemistry parameters improved in tandem. However, mental status changes persisted, and re-evaluation revealed multidirectional nystagmus with bilateral past-pointing. MRI confirmed the diagnosis of Wernicke’s encephalopathy (WE). Prompt recovery followed treatment with high-dose intravenous thiamine. We discuss the co-occurrence of NMS and non-alcoholic WE—highlighting the need for a high index of suspicion for these relatively rare neuropsychiatric diagnoses which are often missed in those with atypical presentations.