Brief Answer: Iron defeciency anemia.No worry for IgG & RDW Detailed Answer: Hi, Thanks for using XXXXXXX I went through the query and understood your concern. * High IgG suggest past history while IgM, IgA suggest the present situation. Since IgA(more specific for celiac disease) was negative no need to worry for now about high IgG as this will return to normal in time. * Increased RDW suggest increase numbers of immature red blood cells (reticulocytes) due to regenerative response to an anemia, because immature anucleate red blood cells are larger than normal. So I the high RDW is a good response to anemia. *Low iron saturation suggest iron defeciency anemia. Once iron gets absorbed by the intestines, it is transported to other locations with the help of a blood protein called transferrin. Iron saturation is calculated by dividing the level of serum iron by the total iron binding capacity (TIBC) and multiplying by 100. The percentage tells how much of the serum iron is actually bound to the available transferrin. So low iron saturation suggests decreased iron absorption from the intestine which is common in celiac disease. So the saturation level comes to normal with time with increasing the iron absorption as it increases the serum iron level. With the oral supplementation of iron, it the Hb level does not increase, then your son may require parenteral(injection) iron therapy to improve his anemia status. Hope this information helps you. Feel free to ask if any related query and I will be glad to answer them. Wish you and your son a good health and faster recovery. Regards

---