Bertulli, C; Hureaux, M; De Mutiis, C; Pasini, A; Bockenhauer, D; Vargas-Poussou, R; La Scola, C; (2020) A Rare Cause of Chronic Hypokalemia with Metabolic Alkalosis: Case Report and Differential Diagnosis. Children , 7 (11) , Article 212. 10.3390/children7110212.

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Abstract

Hypokalemia and metabolic alkalosis can be present in different rare diseases, and the differential diagnosis of these forms is challenging. Apparent mineralcorticoid (AME) excess syndrome is one of these conditions. Characterized by increased blood pressure due to excessive sodium retention and plasma volume, it is caused by a mutation in the HSD11B2 gene encoding the oxydoreductase enzyme 11β-hydroxysteroide dehydrogenase type 2. We report the case of a child presenting with failure to thrive associated with early detection of hypokalemia, metabolic alkalosis, nephrocalcinosis and hypertension in which AME syndrome was detected. A novel mutation in the HSD11B2 gene was identified in this patient. In clinical pictures characterized by metabolic alkalosis and hypokalemia, the evaluation of renin, aldosterone and blood pressure is crucial for accurate diagnosis. AME syndrome is a rare disorder that can be an insidious but lethal disease, if untreated. With clinical signs appearing during the first days of life. Early diagnosis is imperative in order to enable prompt and adequate treatment to improve the outcome of these patients.

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