Investigations. Measurement of plasma glucose, insulin, C-peptide, and β-hydroxybutyrate concentrations during a prolonged supervised fast; sulfonylurea screen; CT, MRI scan and endoscopic ...
In some cases of insulinoma, a 72 h fasting test can produce negative results. 1,2 In Placzkowski and colleagues' study, the 72 h fast test result was negative in three of eight patients who had ...