[Extragastric gastrin liberation. Studies on patients following gastrectomy and duodenopancreatectomy]

28 investigations were performed in control patients with no gastric disease (n equals 10), in patients after total gastrectomy (n equals 10) and in patients after duodenopancreatectomy (n equals 8). We measured the serum gastrin concentrations in the fasting state and after the ingestion of a test meal. The results indicate that more than 60% of the gastrin activity is released from extragastric sites and in addition, it is supposed that about 20% are released from extragastric and extraduodenal sites.