Open access
Oct 2026
Ampullary Neuroendocrine Carcinoma Presenting with Clinically Confirmed Endogenous Hyperinsulinemic Hypoglycemia.
A 65-year-old man without diabetes presented with fasting hypoglycemia. During a fasting test, plasma glucose decreased to 46 mg/dL with inappropriately elevated insulin (11.1 μU/mL) and C-peptide (8.7 ng/mL) levels, confirming endogenous hyperinsulinemic hypoglycemia. Imaging revealed a tumor of the ampulla of Vater w...
Mika Ito, Eiki Ishisaka, Y. Kashii et al.
· Internal medicine · 0 citations