Which one of the following is best for localization of zollinger ellison syndrome?
EUS (endoscopic ultrasound)
Secretin injection test
MRI
Basal gastric acid output
Endoscopic ultrasound permits imaging of ZES with high degree of resolution (<5mm). This modality rules out small neoplasms in pancreas. Imaging modalities : EUS>octreoscan>MRI>USG The secretin provocative test is usually positive, with the criterion of a >120-pg/mL increase over the basal level having the highest sensitivity (94%) and specificity (100%).
Zollinger Ellision Syndrome