I feels like the child is having Celiac disease as TTG IgA is high. , which is causing the digestive issues and malnutrition.
Next Steps
immediately consult a pediatrician or gastroenterologist
Health Tips
The best way to manage this is by starting a gluten-free diet. This means avoiding foods that contain wheat, barley, and rye, such as bread, pasta, cakes, and cereals.
Foods that can be taken :Rice, corn, quinoa ,fruits, vegetables Meat, fish, eggs.
AVOID : Wheat , barley , bread , pasta , cereals.