Pancreatic neuroendocrine tumors: glucagonoma
What radiographic tests are helpful pre-operatively?
Imaging studies may include computed tomography (CT) scanning or magnetic resonance imaging (MRI). Nuclear scanning (i.e., somatostatin receptor scintigraphy) uses a radioactive isotope that attaches to tumor cells; this diagnostic option demonstrates functioning tumors and nicely complements CT and MRI findings. Ultrasonography is helpful and may be performed on the surface of the abdominal skin, with an endoscope inserted into the stomach, or with direct application over the pancreas during an operation. The combination of laboratory results and imaging studies is generally sufficient to establish the diagnosis and extent of a glucagonoma.