Tumour-induced hypoglycaemia: A narrative review

Thomas M. Barber, Christopher A.M. Bannon, Martin O. Weickert, Ioannis Kyrou, Harpal S. Randeva

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    Abstract

    Objective: To provide an overview of the pathogenesis and clinical features of tumour-induced hypoglycaemia (TIH), its effective diagnostic work-up and management strategies and the challenges involved. Background: Hypoglycaemia, defined by a plasma blood glucose level <3.0 mmol/L (<54 mg/dL), results from failure of glucose homeostasis. Although multiple scenarios contribute to the onset of hypoglycaemia, certain tumours represent an important, although relatively uncommon group of causative factors. In patients with unexplained hypoglycaemia, it is important to conduct a careful clinical assessment, with detailed investigations to ascertain the underlying cause(s), and initiate appropriate and effective therapies. TIH often presents a clinical challenge for both accurate and timely diagnosis and effective management. Methods: We performed a narrative literature review using PubMed and search-term "Tumour-Induced Hypoglycaemia", with articles written in English. Conclusions: There are two main groups of TIH: insulinoma and non-islet cell tumours (NICTs). Insulinomas are the commonest form of pancreatic neuroendocrine tumour, and a well-recognised cause of hyperinsulinaemia associated with recurrent hypoglycaemia. Conversely, NICTs mediate hypoglycaemia through the excessive production of big insulin-like growth factor 2 (IGF2), that cross-reacts with the insulin receptor. Through careful biochemical assessment, accurate diagnosis of Insulinoma versus NICTs provides a rationale for effective and individually tailored management.

    Original languageEnglish
    Article number22
    JournalJournal of Laboratory and Precision Medicine
    Volume6
    DOIs
    Publication statusPublished - 30 Jul 2021

    Bibliographical note

    Publisher Copyright:
    © Journal of Laboratory and Precision Medicine. All rights reserved.

    Keywords

    • Insulinoma
    • Non-islet cell tumour (NICT)
    • Tumour-induced hypoglycaemia (TIH)

    ASJC Scopus subject areas

    • Clinical Biochemistry
    • Biochemistry, medical

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