Insulinoma

MOST COMMON functioning neuroendocrine tumor but usually 90% benign

Whipple's triad - Hypoglycemic symptoms when fasting; <50 mg/dl blood glucose; Symptoms resolve with glucose

QUESTION: Diagnosis of insulinoma? and Treeatment
ANSWER: low fasting glucose with elevated C-peptide and localization with CT scan - enucleate if < 2cm, formal resection for > 2cm