Best provocative test for diagnosis of Gastrinoma is:
Answer is B (Secretin injection test) Gastrinomas (Zollinger Ellison Syndrome) are characterized by peptic ulceration due to hypersecretion of gastrin by a non-beta cell tumor. Secretin injection test is the most valuable provocative test in identifying patients with ZES.
Ca++ infusion test
Secretin injection test
ACTH stimulation test
Steroid assay