Presentation
Loss of consciousness episodes.
Patient Data
A 24 mm iso-dense hyper-vascular mass with ring enhancement is noted in the pancreatic uncinate process that becomes isodense with surrounding parenchyma on delayed images. There is no sign of local invasion, vascular encasement and regional lymphadenopathy.
Two stones less than 25 mm are seen in the gallbladder.
Case Discussion
Pathology-proven pancreatic endocrine tumor (insulinoma).
Insulinoma is the most common type of pancreatic endocrine tumor, usually present as a small well-defined hypervascular mass that may be found anywhere in the pancreas. Occasionally insulinomas may show early but transient ring enhancement. 10% are in association with MEN type I, 10% are multiple, and 10% may be malignant.
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