A Rare Duodenal Subepithelial Tumor: Duodenal Schwannoma
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초록
Schwannomas are uncommon neoplasms that arise from Schwann cells of the neural sheath. Gastrointestinal schwannomas are rareamong mesenchymal tumors of the gastrointestinal tract, and only a few cases have been reported to date. Duodenal schwannomas areusually discovered incidentally and achieving a preoperative diagnosis is difficult. Schwannomas can be distinguished from othersubepithelial tumors on endoscopic ultrasonography; however, any typical endosonographic features of duodenal schwannomas havenot been reported due to the rarity of these tumors. Immunohistochemistry is essential to distinguish schwannomas fromgastrointestinal stromal tumors and leiomyomas. We report a case of duodenal schwannoma found incidentally during a health checkupendoscopy. On endoscopic ultrasonography, this tumor was suspected as a gastrointestinal stromal tumor; therefore, the patientunderwent laparoscopic wedge resection of the tumor. Histopathology and immunohistochemistry confirmed that the duodenal lesionwas a benign schwannoma.
Abstract
Schwannomas are uncommon neoplasms that arise from Schwann cells of the neural sheath. Gastrointestinal schwannomas are rareamong mesenchymal tumors of the gastrointestinal tract, and only a few cases have been reported to date. Duodenal schwannomas areusually discovered incidentally and achieving a preoperative diagnosis is difficult. Schwannomas can be distinguished from othersubepithelial tumors on endoscopic ultrasonography; however, any typical endosonographic features of duodenal schwannomas havenot been reported due to the rarity of these tumors. Immunohistochemistry is essential to distinguish schwannomas fromgastrointestinal stromal tumors and leiomyomas. We report a case of duodenal schwannoma found incidentally during a health checkupendoscopy. On endoscopic ultrasonography, this tumor was suspected as a gastrointestinal stromal tumor; therefore, the patientunderwent laparoscopic wedge resection of the tumor. Histopathology and immunohistochemistry confirmed that the duodenal lesionwas a benign schwannoma.
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