<prompt> False about Zollinger Ellison syndrome:It is due to the presence of a GastrinomaGastrin provocation tests are a part of diagnostic work upIt might be associated with ulcers in unusual locations in GITThey may be associated with insulinomas.  <response>: Ans. d They may be associated with InsulinomasRef: Sabiston 20th edition Page 954 Zollinger Ellison syndrome is a manifestation of Gastrinoma Secretin Stimulation test - is used a provocative test in cases of borderline elevation of Gastrin ZES is associated with unusual location of ulcers like in Jejunum. 