GPT and Hepatic steatosis: According to the most recent NASPGHAN Clinical Practice Guideline for the Diagnosis and Treatment of Nonalcoholic Fatty Liver Disease in Children [11], ALT increased to more than twice the upper limit, after the exclusion of other causes of fatty liver, in overweight or obese children older than 10 years indicates NAFLD with 88% sensitivity, but only 26% specificity.