Megaloblastic Anaemia Complicating Dietary Treatment of Phenylketonuria in Infancy

Nutritional deficiencies may complicate the treat- ment of phenylketonuria by 'synthetic' phenylalanine restricted diets.This danger is greatest in infancy when growth is rapid.We report the occurrence of megaloblastic anaemia of infancy due to folic acid deficiency, during the dietary treatment of a baby with phenyl- ketonuria.Case Report Simon B. was born at home on July 16, 1960, the third child of healthy unrelated parents.The pregnancy and delivery at full term were uneventful and his birth weight was 7i lb.(3*4 kg.).