[Zollinger-Ellison syndrome with high blood calcium levels resembling the neoplastic type (author's transl)].

A patient with the Zollinger-Ellison syndrome was found to have increased blood gastrin levels associated with the secretion of a compound which produced high blood calcium levels. This compound differed from immunoreactive parathormone, and caused the clinical picture of primary neoplastic hyperparathyroidism. This case is compared with other cases of multiple-secreting Zollinger-Ellison syndrome reported in the published literature, within the framework of the "A.P.U.D." system.