A 45-year-old man has recurrent fasting confusion relieved by eating. During a supervised fast, glucose is 2.1 mmol/L with insulin 12 mU/L, C-peptide

Question

A 45-year-old man has recurrent fasting confusion relieved by eating. During a supervised fast, glucose is 2.1 mmol/L with insulin 12 mU/L, C-peptide 820 pmol/L and sulfonylurea screen negative. CT pancreas shows a 1.2 cm lesion in the tail. What is the most likely diagnosis?

Accepted Answer

Insulinoma as the diagnosis

Answer

Sulfonylurea ingestion

Answer

Factitious insulin administration

Answer

Adrenal insufficiency

Answer

Reactive postprandial hypoglycaemia

Insulinoma — SCE Endocrinology MCQ

A 45-year-old man has recurrent fasting confusion relieved by eating. During a supervised fast, glucose is 2.1 mmol/L with insulin 12 mU/L, C-peptide 820 pmol/L and sulfonylurea screen negative. CT pancreas shows a 1.2 cm lesion in the tail. What is the most likely diagnosis?