Unusual glycogenic hepatopathy causing abnormal liver enzymes in a morbidly obese adolescent with well-controlled type 2 diabetes: resolved after A1c was normalized by metformin.

We report, for the first time, a case of an accumulation of glycogen in the liver causing elevation of liver enzymes in a 15-year-old morbidly obese adolescent male with well-controlled type 2 diabetes. Notably, the patient did not have poorly controlled type 1 diabetes and did not require insulin. After normalization of the A1c with metformin, elevated liver enzymes returned to normal.