[A Case of Primary Somatostatin-Producing Tumor of the Duodenum with Liver Metastases with Long-Term Survival of More than 20 Years]
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A 52-year-old woman underwent esophagogastroduodenoscopy after an abnormal medical examination, which revealed a mass lesion over half the circumference of the superior duodenal angulus. Immunostaining was diffusely positive for somatostatin, synaptophysin, an... ...
