Einoder Sophie H, Thomson Alice C M, Urquhart Paul, Smart Philip J
Monash University Eastern Health Clinical School, Eastern Health, Box Hill, Australia.
Department of Surgery, Epworth Health, Box Hill, Victoria, Australia.
J Surg Case Rep. 2018 Nov 22;2018(11):rjy312. doi: 10.1093/jscr/rjy312. eCollection 2018 Nov.
Prolapsing mucosal folds are uncommon benign colonic lesions that when inflamed may macroscopically resemble, and be confused with, an adenomatous or hyperplastic polyp. They are usually small and rarely cause symptoms. We report the case of a 55-year-old female admitted to hospital following six episodes of significant rectal bleeding. A colonoscopy revealed a 45 × 12 × 5 mm pedunculated polyp in the sigmoid colon. There was no evidence of haemorrhoids, colitis or diverticulosis. The polyp was resected by electrosurgical snare at 40 cm and a resolution clip was used to prevent postoperative bleeding. Histology of the polyp demonstrated a polypoid prolapsed mucosal fold with a core of fibrovascular submucosal tissue and normal overlying mucosa. In an extensive review of available literature, no polyp of this size has been reported.
黏膜皱襞脱垂是一种罕见的良性结肠病变，发炎时在宏观上可能类似于腺瘤性或增生性息肉并与之混淆。它们通常较小，很少引起症状。我们报告一例55岁女性，因六次严重直肠出血入院。结肠镜检查发现乙状结肠有一个45×12×5mm的带蒂息肉。没有痔疮、结肠炎或憩室病的证据。在40cm处用电圈套器切除息肉，并使用止血夹预防术后出血。息肉组织学显示为息肉样脱垂黏膜皱襞，核心为纤维血管性黏膜下组织，其上黏膜正常。在对现有文献的广泛回顾中，尚未报道过这种大小的息肉。
