alexa Abstract | Cytological Features of the Cystic Fluid of Pancreatic Schwannoma with Cystic Degeneration. A Case Report

JOP. Journal of the Pancreas
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Context Schwannomas are benign neoplasms arising from peripheral nerve tissue. Pancreatic schwannoma is a very rare condition. We present the histological and cytological features of a pancreatic schwannoma with cystic degeneration. Case report A 51-year-old male was diagnosed with a cystic tumor measuring approximately 6 cm in the tail of the pancreas. Distal pancreatectomy and splenectomy were performed. Cystic fluid from the tumor was obtained intraoperatively by fine-needle aspiration, and it showed scattered spindle tumor cells against a background of hemosiderin-laden histiocytes. During the operation, we informed the surgeon that the tumor consisted of “atypical spindle cells”. Histologically, the tumor was diagnosed as a schwannoma with cystic degeneration which had originated in the pancreas. The diagnosis was confirmed by positive immunostaining of the tumor cells in both histological and cytological materials for S-100 protein. Conclusion Problems occasionally arise with the use of fine-needle aspiration in the diagnosis of cystic diseases of the pancreas because of the difficulty in obtaining adequate specimens. Nevertheless, it should be emphasized that intraoperative fine-needle aspiration is as informative as a frozen section diagnosis, when appropriately performed.

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Author(s): Kenichi Hirabayashi Masanori Yasuda Shinobu Umemura Hitoshi Itoh Johbu Itoh Robert Yoshiyuki Osamura Naoki Yazawa Toshihide Imaizumi

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