Diagnostic criteria for ZES include the following: Elevated levels of Basal Acid Output (BAO), greater than 15 mEq in unoperated patients and greater than 5 mEq if previous acid-reducing surgery has been performed; Elevated level of fasting serum gastrin (>100 pg/mL until 1994, >200 pg/mL since 1994); Abnormal results from stimulation testing with secretin (an […]