Gastrinomas are neuroendocrine neoplasms (NENs), that occur primarily in the duodenum
and pancreas, which ectopically secrete gastrin, resulting in the Zollinger-Ellison syndrome …

ZES was first described in 1955 by two surgeons, RM Zollinger and EH Ellison, in two
patients with intractable peptic ulcer disease (1). Although previous cases had been …