Computed tomographic detection of nonbeta pancreatic islet cell tumors.

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Abstract
Patients (25) with non-beta pancreatic islet cell tumors were examined by computed tomography (CT). In 8 patients (32%), the primary pancreatic tumor was identified, and in 10 patients (40%), hepatic metastases were seen. Only 1 of the 8 tumors seen on CT was larger than 10 cm; the other 7 ranged from 4-9 cm in diameter. Tumors in ectopic locations or possible cellular hyperplasia rather than a discrete tumor may account for the relative insensitivity of CT visualization, particularly among patients with Zollinger-Ellison syndrome.