Objective: Hypoglycemia due to insulin-like growth factor (IGF)-2 secretion by a tumor, referred to as nonislet cell tumor hypoglycemia, or IGF-2-oma, is a rare and serious paraneoplastic complication of malignancy. When surgical resection is not an option, studies have shown improvement of hypoglycemia with glucocorticoids. We describe the case of a patient with persistent hypoglycemia despite prolonged high-dose glucocorticoid therapy.Methods: A 22-year-old man with known metastatic hepatocellular carcinoma presented with dizziness and weakness. Initial blood glucose level was found to be 10 mg/dL. Multiple injections of 50% dextrose and continuous infusion with 25% dextrose were required to maintain normal blood glucose levels. Laboratory work-up revealed suppressed C-peptide and insulin levels with hypoglycemia and an elevated ratio of IGF-2 to IGF-1, consistent with IGF-2 secretion by the tumor.Results: Despite high-dose glucocorticoid therapy, continuous intravenous dextrose was necessary to prevent hypoglycemia. In addition, the patient's tumor progressed rapidly, and he was ultimately discharged to hospice on intravenous dextrose.
Conclusion
CASE REPORTA 22-year-old man presented with nausea, vomiting, dizziness, and severe weakness for 1 day. Three weeks prior, he had been diagnosed with hepatocellular carcinoma with pulmonary metastases, secondary to chronic hepatitis B infection. In the emergency room, the patient was found to have a capillary blood glucose level of 10 mg/ dL, and he received multiple intravenous doses of 50 mL of 50% dextrose (50 mg/mL). Despite these treatments, he was unable to sustain euglycemia, and continuous dextrose 25% (250 mg/mL) infusion was started. On physical examination, he appeared cachectic, with lower extremity edema, exquisite right upper-quadrant abdominal tenderness, and hepatomegaly. Initial laboratory tests were significant for serum glucose 10 mg/dL, serum calcium of 12.4 mg/dL (corrected for albumin, 13