Pancreatic schwannoma diagnosed by EUS-FNAB

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  • 超音波内視鏡下穿刺吸引生検（EUS-FNAB）にて診断しえた膵神経鞘腫の1例

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<p>A 62-year-old man was referred to our hospital for a cystic lesion in the pancreatic head detected by abdominal ultrasonography during a routine medical examination. This pancreatic mass was suspected to be a solid tumor because of gradual enhancement on contrast-enhanced CT and MRI scans, but we could not establish the diagnosis using only imaging findings. Therefore, EUS-FNAB was performed. Histopathological examination revealed a large number of spindle cells arranged in fascicles. Immunohistochemically, the spindle cells were positive for S-100 protein and negative for c-kit, CD34, α-SMA. The mass was diagnosed as a pancreatic schwannoma. The patient is followed without administering treatment, because the Mib-1 index was low (1-2%), and there were no other malignant signs.</p>

Journal

  • Suizo

    Suizo 34 (1), 37-45, 2019-02-25

    Japan Pancreas Society

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