“…In several of the recent ZES papers reviewed above, the results of SRI in hypergastrinemic patients was used to support a diagnosis of ZES, rather than confirming the diagnosis with an assessment of gastric pH, as is recommended in the existing guidelines [82, 90–92, 96, 98] (Table 1). While the presence of a tissue diagnosis of a NET in a patient with hypergastrinemia and/or typical symptoms has always been used to help confirm the diagnosis (75;83–85;89;91], this approach is increasingly being used [83, 84, 99, 113], without a preceding measurement of acid secretory capability, because of the increased availability of endoscopic ultrasound and percutaneous biopsy/cytologic techniques. However, this approach has not yet been factored into any proposed guidelines for the diagnosis of ZES and not all NETs identified this way, are invariably the cause of the hypergastrinemia.…”