Abstract
Insulinoma is the most common cause of endogenous hyperinsulinism. Most are benign and solitary. Hereby the authors present a 36-year-old woman who was admitted for confusion, aggressive behaviour, and visual hallucinations. Initial investigation revealed hypoglycaemia, and the patient recovered after the administration of intravenous glucose. The 72-hour fasting test was compatible with hyperinsulinism. Endoscopic ultrasound detected a nodule in the tail of the pancreas. Surgical resection of the nodule was performed, and histological examination revealed a pancreatic neuroendocrine tumour. The patient had a favourable outcome with resolution of the symptoms.
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