The authors describe a pediatric patient with repaired hypoplastic left heart syndrome developing protein-losing enteropathy, hypocalcemia, vitamin D deficiency, and hemichorea. After correction of nutritional vitamin D deficiency with calcium and vitamin D supplementation, the chorea resolved. Hypoalbuminemia also improved after the correction of vitamin D deficiency without requiring albumin infusions. This report also raises the possible role of calcium or vitamin D in the intestinal loss of albumin in protein-losing enteropathy.
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