Context We report theimaging features of pancreatic schwannomas, a rare benign type of pancreatictumor. Case report A 66-year-old woman was admitted to our hospital witha pancreatic tumor indicated in medical examinations. Computed tomography (CT),magnetic resonance imaging (MRI) and endoscopic ultrasonography (EUS) revealeda solid and cystic tumor, 3 cm in diameter, within the body of the pancreas.Contrast-enhanced CT, MRI and ultrasonography showed partial enhancement in thesolid component. Endoscopic retrograde cholangiopancreatography (ERCP) andangiography showed no abnormal findings. A distal pancreatectomy together witha splenectomy and lymph node dissection were performed with a tentativediagnosis of mucinous cystic neoplasm of the pancreas. The cut surface of theresected pancreas showed a well-demarcated, pale yellow, solid tumor within thepancreas parenchyma. Histopathological examination of the tumor revealedproliferation of the spindle cells showing interlacing and palisading patterns.Immunohistochemically, these spindle cells were positive for S-100 protein andvimentin, and negative for alpha-smooth muscle actin, CD34, and cytokeratin.Thus the tumor was diagnosed as a pancreatic schwannoma. Conclusion CTand US can detect pancreatic schwannomas as solid and cystic masses, and MRIshows a relatively characteristic feature. Imaging procedures such as CT, MRIand US are able to differentiate a pancreatic tumor, such as a pancreaticschwannoma.
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