Protein-losing enteropathy following the Fontan procedure in a child with intestinal lactase deficiency treated with lactose-free diet.

Unlabelled: A 12-year-old girl presented with a protein-losing enteropathy. Symptoms started 4 weeks after undergoing the Fontan procedure at the age of 1.5 years for mitral atresia, ventricular septal defect, and double-outlet right ventricle.