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  • INSULINOMA  (1)
  • calcium  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Digestive diseases and sciences 33 (1988), S. 977-981 
    ISSN: 1573-2568
    Schlagwort(e): calcium ; jejunal lumen ; serotonin ; portal blood
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The effect of intravenous calcium bolus (180 mg in 10 ml normal saline over 25–30 sec) on the release of serotonin into the jejunal lumen and the portal and peripheral venous circulation was studied. Proximal jejunal 25-cm cannulated Thiry-Vella loops were perfused with a neutral physiological buffer in an isoperistaltic direction at 2 ml/min. One minute after the calcium bolus, serum calcium levels increased from 8.7±0.3 to 14.2±0.8 mg/dl. Jejunal luminal concentrations of 5 HT increased from 135±21 to 208±44 ng/ml at the same time; luminal levels peaked at 236±27 ng/ml at 7 min and slowly returned to baseline. In contrast, portal and systemic venous concentrations did not change after intravenous calcium bolus. The data support the contention that there are independent mechanisms for the release of serotonin into the bowel lumen and the blood stream.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Digestive diseases and sciences 43 (1998), S. 1784-1790 
    ISSN: 1573-2568
    Schlagwort(e): NESIDIOBLASTOSIS ; ISLET CELL ; NEUROENDOCRINE TUMOR ; INSULINOMA
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract George F. Laidlaw first described a pancreatic abnormality now known to be the most common cause of persistent hyperinsulinemic hypoglycemia in infants in 1938 (1, 2). The term he coined, nesidioblastosis, is derived from the Greek words for “islets” (nesidia) and “germ” (blastos) (3). It accurately describes the characteristic feature of nesidioblastosis, islet cells differentiating and budding from ductal epithelium. In adults, hyperinsulinemic hypoglycemia is rarely caused by nesidioblastosis and is usually caused by insulinoma or exogenous insulin treatment (4, 5). The first case series of adult nesidioblastosis was reported by Harness et al in 1981 (6). Since this case series of six patients, there have been only sporadic literature reports of adult nesidioblastosis, documenting fewer than 20 cases of adult nesidioblastosis over the past 15 years (3, 7-10). This paper presents an adult patient with hyperinsulinemic hypoglycemia due to nesidioblastosis and provides a guide to the diagnosis and treatment of this rare disorder in the adult population.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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