How is a glucagonoma diagnosed?

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A diagnosis of a glucagonoma is established with a significant elevation of glucagon levels in the blood. Other common laboratory abnormalities include elevated blood sugar and chromogranin A values, and anemia (decreased red blood cells). Symptoms of glucagonomas are often vague and may be evident for years before a diagnosis is secured. Consequently, the tumors may be relatively large (an average diameter of 4-6cm) when they are discovered.

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