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Journal of Clinical Endocrinology & Metabolism, Vol 40, 1121-1124, Copyright © 1975 by Endocrine Society

ARTICLES

Failure of somatostatin to inhibit tolbutamide-induced insulin secretion in patients with insulinomas: a possible diagnostic tool

M Lorenzi, JE Gerich, JH Karam and PH Forsham

The effects of somatostatin on tolbutamide-stimulated insulin release were studied in 4 patients with insulin-producing tumors of the pancreas and in 6 normal subjects. In contrast to its effective inhibition of insulin release in normal subjects, somatostatin, without exception, failed to inhibit tolbutamide-induced insulin release in the patients with pancreatic beta-cell tumors. This differential effect of somatostatin may prove useful in the diagnosis of insulin-producing tumors of the pancreas.




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Copyright © 1975 by The Endocrine Society