Hepatomegaly in an Adult With Type 1 Diabetes Mellitus: Mauriac Syndrome Still Exists in a Developed Country.

We report a case of a 19-year-old male with type 1 diabetes mellitus (T1DM) diagnosed at age 2 years, childhood growth retardation, and multiple admissions for diabetic ketoacidosis, presenting with hepatomegaly and elevated liver transaminase. His hemoglobin A1c (HbA1c) was 13.1% (reference range, < 5.7%). Massive hepatomegaly without splenomegaly was noted and accompanied by significant liver enzyme derangement, and lactatemia. Extensive viral, serologic, genetic, and metabolic tests to identify the etiology of hepatomegaly were unrevealing. A liver biopsy showed microvesicular and macrovesicular steatosis with periportal and lobular inflammation consistent with glycogenic hepatopathy (GH) of Mauriac syndrome. A continuous subcutaneous insulin infusion therapy was initiated and gradually titrated. With an improvement in HbA1c down to 9.2% over 9 months, liver transaminase levels became normalized. The current report includes a thorough evaluation of causes of hepatomegaly in an adult with T1DM and highlights the importance of glycemic control in ameliorating GH.