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Journal of Clinical Endocrinology & Metabolism Vol. 56, No. 6 1236-1242
doi:10.1210/jcem-56-6-1236
Copyright © 1983 by the Endocrine Society.
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Five Cases of Somatostatinoma: Clinical Heterogeneity and Diagnostic Usefulness of Basal and Tolbutamide-Induced Hypersomatostatinemia*

Daniel Pipeleers, Etienne Couturier, Willy Gepts, Jean Reynders and Guido Somers

Department of Metabolism and Endocrinology and Department of Pathology, Vrije Universiteit Brussel, the Department of Endocrinology, Hôpital d'lxelles, and the Department of Internal Medicine, Hôpital St. Pierre, Université Libre de Bruxelles, Brussels, Belgium

Address requests for reprints to: Daniël G. Pipeleers, Department of Metabolism and Endocrinology, Fakulteit Geneeskunde en Farmacie, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Brussels, Belgium.

Five cases of somatostatinoma are reported, four being primarily located in the pancreas and one in the duodenum. The diagnosis was based upon the histological and immunochemical characteristics of tumoral and metastatic tissue. A marked clinical heterogeneity was noted: one patient presented with gallstones, steatorrhea, and diabetes, two patients suffered from severe hypoglycemic attacks, and two cases were admitted for obstructive jaundice. This varying symptomatology was related to differences in the circulating levels of biologically active somatostatin and to a variable cellular composition of the tumor. In all cases, a basal and/or tolbutamideinduced hypersomatostatinemia was measured. It is concluded that the clinical and hormonal features of the earlier defined somatostatinoma syndrome are no requisite for the diagnosis of somatostatinoma; the analysis of plasma somatostatin immunoreactivity might lead to a higher detection rate of this endocrine tumor. (J Clin Endocrinol Metab 56: 1236, 1983)

* This study was supported by grants from the Belgian Fonds Geneeskundig Wetenschappelijk Onderzoek (3.0005.79), the Belgian Ministerie Wetenschapsbeleid (80/85-9), and the Nationale Bank van Belgie.

Received October 13, 1982.




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Copyright © 1983 by The Endocrine Society