ABSTRACT
We present a case of Mauriac syndrome in a young woman with poorly controlled type 1 diabetes mellitus. Liver complications are well known in the context of type 2 diabetes mellitus, it is associated metabolic complications and with the non-alcoholic fatty liver disease spectrum. This case brings to light a less well-known liver complication associated with type 1 diabetes mellitus.
Case presentation
A 46-year-old woman with poorly controlled insulin dependent diabetes mellitus, diagnosed at the age of 30 years old, was referred to the gastroenterology clinic following admission to the emergency department (ED) with abdominal pain and significantly deranged liver function tests (LFTs), warranting further investigation.
Laboratory studies revealed a serum glucose level of 17.1 mmol/L, amylase of 63 U/L, C-reactive protein of 5 mg/L, bilirubin of 18 μmol/L, albumin of 30 g/L, alkaline phosphatase of 483 U/L, alanine aminotransferase of 267 U/L, gamma-glutamyl transferase of 1,314 U/L, international normalised ratio of 0.96, platelets of 394 × 109/L and cholesterol of 6.0 mmol/L. Her glycated haemoglobin (HbA1c) levels in the year preceding this admission had persistently been in triple digits ranging 102–116 mmol/L, suffering multiple admissions with diabetic ketoacidosis (DKA).
Contrast enhanced computed tomography (CT; Fig 1a) revealed massive hepatomegaly, with a smooth capsule and no focal liver lesions. A non-invasive liver screen was negative for viral, autoimmune or metabolic causes of liver disease. An outpatient liver biopsy was performed following clinic review. Liver histology revealed steatohepatitis, mild fibrosis and diffuse glycogen accumulation (Fig 2).
Computed tomography of the abdomen and pelvis (coronal section). a) Marked hepatomegaly showing 22 cm craniocaudal length. b) Resolution of hepatomegaly with a 6 cm reduction in liver craniocaudal length.
Histopathology imaging. a) Haematoxylin and eosin stain ×50. b) Haematoxylin and eosin stain ×200. c) Periodic acid Schiff stain ×100 showing abundantly glycogenated cytoplasm. d) Diastase–periodic acid Schiff stain ×100 showing glycogenated cytoplasm has disappeared after digestion.
Following a period of weight loss and significantly improved glycaemic control, her HbA1c reduced to 71 mmol/L, and her LFTs normalised completely. A repeat CT (Fig 1b) revealed resolution of the hepatomegaly with a 6 cm reduction in the craniocaudal length of the right lobe of liver.
Discussion
Hepatic glycogenesis (HG) is a unique clinical entity, possibly under-diagnosed due to the difficulty in distinguishing it clinically from non-alcoholic fatty liver disease (NAFLD).1 HG is a rare complication of poorly controlled type 1 diabetes mellitus, characterised by glycogen accumulation in hepatocytes.2 Mauriac syndrome was first described in 1930 as a glycogenic hepatopathy characterised by hepatomegaly, deranged liver enzymes, cushingoid appearance, hypercholesterolaemia, growth failure and delayed puberty.2 Mauriac syndrome is more commonly recognised in children and adolescents, however, there are reports of cases in adults, albeit not always with the characteristic extrahepatic features.3 Patients typically present with abdominal pain, mediated by liver capsule stretch due to hepatomegaly. With strict glycaemic control, HG has an excellent prognosis with no reported cases of end-stage liver disease.4 Liver biopsy is required to differentiate between NAFLD and HG.
- © Royal College of Physicians 2021. All rights reserved.
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