BACKGROUND We report a case of an intraabdominal desmoid tumor that occurred at a gastro-pancreatic lesion with spontaneous cystic features, and present the successful laparoscopic resection of the tumor. CASE PRESENTATION A 20-mm retroperitoneal cystic mass with a solid component was found adjacent to the stomach and pancreatic body in a 52-year-old woman with no history of familial adenomatous polyposis. Laparoscopic spleen-preserving distal pancreatectomy with wedge resection of the stomach was performed, and complete resection was achieved without intraoperative and postoperative complications. Histopathological examination by immunohistochemistry enabled diagnosis of a desmoid tumor that had originated from the stomach and invaded the pancreatic parenchyma with a spontaneous cystic change. We herein report an extremely rare case of an intraabdominal desmoid tumor with a spontaneous cystic change. CONCLUSION Regardless of its rarity, desmoid tumor should be included in the preoperative differential diagnosis of a cystic intraabdominal mass, and laparoscopic function-preserving surgery may be an optimal treatment option.

中文翻译：

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腹腔镜保留脾远端胰切除术治疗胃胰腺病变处的实体囊性腹腔内类胶质瘤：一例。

背景技术我们报道一例发生在腹膜内类恶性肿瘤的病例，该病例发生在具有自发性囊性特征的胃胰腺病变处，并成功地进行了腹腔镜切除。病例介绍一名52岁女性无家族性腺瘤性息肉病史，在胃和胰体附近发现了一个20毫米的腹膜后囊性肿块，并带有固体成分。进行腹腔镜保留脾远端胰切除术并进行楔形胃切除术，实现了完全切除，而没有术中和术后并发症。通过免疫组织化学的组织病理学检查能够诊断出起源于胃的侵袭性胰腺实质性囊肿，并自发发生囊性改变。我们在此报道了具有自发性囊性改变的腹腔内类胶质瘤的极少数病例。结论不论其稀有性如何，术前鉴别诊断囊性腹腔内肿块均应包括类囊性肿瘤，而腹腔镜功能保留手术可能是最佳治疗选择。