MCQ: Type 1 Diabetes Mellitus with Delayed Puberty

Correct Answer: C. Mauriac syndrome

Explanation:

Mauriac syndrome is a rare complication of poorly controlled type 1 diabetes mellitus (T1DM), classically characterized by hepatomegaly due to hepatic glycogen accumulation, growth retardation, delayed puberty, and a cushingoid appearance. It is associated with prolonged hyperglycemia and marked fluctuations in blood glucose, often in children and adolescents with inadequate glycemic control.

In this patient, the combination of longstanding T1DM, markedly elevated HbA1c (12.4%), severe short stature, delayed pubertal development, rounded face, protuberant abdomen, hepatomegaly, elevated aminotransferases, and delayed bone age strongly supports Mauriac syndrome.

Pathophysiology

Poor glycemic control, particularly alternating periods of hyperglycemia and insulin administration, promotes excessive hepatic glycogen deposition. Insulin stimulates glycogen synthesis, and the large fluctuations in glucose and insulin availability contribute to glycogen accumulation within hepatocytes, producing hepatomegaly and sometimes elevated aminotransferases.

Chronic poor metabolic control also contributes to impaired growth and delayed sexual maturation through disturbances in the growth hormone–IGF-1 axis, reduced IGF-1 bioavailability, and associated metabolic abnormalities. The rounded face and protuberant abdomen produce the characteristic cushingoid appearance, although endogenous or exogenous glucocorticoid excess is not required for the diagnosis.

Why the other options are incorrect

A. Autoimmune hepatitis associated with type 1 diabetes mellitus: Autoimmune hepatitis may coexist with T1DM and cause hepatomegaly and elevated aminotransferases. However, it does not characteristically explain the combined findings of growth retardation, delayed puberty, delayed bone age, and a cushingoid appearance in a child with longstanding poorly controlled diabetes.

B. Glycogenic hepatopathy without an associated growth disorder: Glycogenic hepatopathy is characterized by excessive glycogen accumulation in hepatocytes, hepatomegaly, and often reversible elevation of liver enzymes. It can occur independently, but the additional growth failure, delayed puberty, and cushingoid features in this patient indicate the broader clinical syndrome of Mauriac syndrome. Glycogenic hepatopathy is an important hepatic component of Mauriac syndrome.

D. Metabolic dysfunction-associated steatotic liver disease (MASLD): MASLD is associated with hepatic steatosis and metabolic risk factors such as obesity, insulin resistance, and dyslipidemia. It does not typically produce the characteristic combination of severe growth retardation, delayed puberty, and cushingoid appearance in a child with poorly controlled T1DM.

E. Wilson disease: Wilson disease can present in childhood or adolescence with hepatic dysfunction and elevated aminotransferases. However, the characteristic diabetic history and associated growth and pubertal abnormalities strongly favor Mauriac syndrome. Wilson disease should still be considered if liver abnormalities persist or the clinical findings are atypical.

Key examination points

• Classic association: Poorly controlled T1DM with hepatomegaly, growth failure, delayed puberty, and cushingoid features.

• Liver mechanism: Hepatic glycogen accumulation, also termed glycogenic hepatopathy.

• Growth mechanism: Disturbance of the growth hormone–IGF-1 axis and chronic metabolic dysregulation.

• Liver enzymes: Aminotransferases may be elevated and can improve with better glycemic control.

• Management: Optimize insulin therapy and glycemic control, support nutrition, monitor growth and pubertal progression, and investigate alternative liver diseases when indicated.

Clinical pearl

In a child with longstanding poorly controlled T1DM, hepatomegaly alone suggests glycogenic hepatopathy, whereas hepatomegaly accompanied by growth retardation, delayed puberty, and a cushingoid appearance strongly suggests Mauriac syndrome.

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