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Noncompaction of the Ventricular Myocardium and Hydrops Fetalis in Cobalamin C Disease

Overview
Journal JIMD Rep
Publisher Wiley
Date 2013 Feb 23
PMID 23430797
Citations 12
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Abstract

Cobalamin C disease (cblC), a form of combined methylmalonic acidemia and hyperhomocysteinemia caused by mutations in the MMACHC gene, may be the most common inborn error of intracellular cobalamin metabolism. The clinical manifestations of cblC disease are diverse and range from intrauterine growth retardation to adult onset neurological disease. The occurrence of structural heart defects appears to be increased in cblC patients and may be related to the function of the MMACHC enzyme during cardiac embryogenesis, a concept supported by the observation that Mmachc is expressed in the bulbis cordis of the developing mouse heart. Here we report an infant who presented with hydrops fetalis, ventricular dysfunction, and echocardiographic evidence of LVNC, a rare congenital cardiomyopathy. Metabolic evaluations, complementation studies, and mutation analysis confirmed the diagnosis of cblC disease. These findings highlight an intrauterine cardiac phenotype that can be displayed in cblC disease in association with nonimmune hydrops.

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