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Characterization of megapouch in patients with restorative proctocolectomy

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Abstract

Background

Megapouch is a rare functional complication of restorative proctocolectomy with ileal pouch-anal anastomosis characterized by pouch ± small bowel dilatation with no evidence of obstruction on endoscopy and imaging. Little is known about clinical characteristics and outcomes of this entity.

Methods

We included all patients diagnosed with megapouch at our institution, identified from a pouch database. Data on baseline characteristics, management, and outcomes were documented and analyzed from electronic medical records. Appropriate statistical measures were used. p < 0.05 was considered significant.

Results

Twenty-three patients with megapouch were identified. The mean age was 40.7 years; 95.6% had underlying ulcerative colitis; most common indication for colectomy was medically refractory disease (56.5%). Abdominal pain (82.6%) and bloating (52.2%) were most common presenting symptoms. Most common finding on pouchoscopy was pouch dilatation (81.8%), while barium or gastrografin enemas and MRI/CT mostly revealed dilatation of pouch and/or small bowel. Fourteen (66.7%) patients required some forms of surgery—six patients required pouch excision and three required either pouch redo or revision. Rates of pouch failure and IBD-related 1-year hospitalization were higher among patients managed surgically versus those managed medically (p = 0.007 and 0.024, respectively), while need for escalation of IBD-therapy was comparable between the groups (p = 0.133). No deaths were reported and no patient had recurrence of megapouch. IPAA revision or redo did not lead to more IBD-related morbidity.

Conclusions

Majority of our patients with megapouch required surgery. In selected patients, redo pouch offered cure. Rates of pouch failure and IBD-related 1-year hospitalization were higher among patients managed surgically.

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Acknowledgements

Dr. Bo Shen has been holder of the Ed and Joey Story Endowed Chair at the Digestive Disease & Surgery Institute, Cleveland Clinic, established in 2007.

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  1. Center for Inflammatory Bowel Disease, Digestive Disease Institute, Cleveland Clinic, Cleveland, OH, USA

    Preeti Shashi & Bo Shen

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  1. Preeti Shashi
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Correspondence to Bo Shen.

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Preeti Shashi and Bo Shen have no conflicts of interest or financial ties to disclose.

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Shashi, P., Shen, B. Characterization of megapouch in patients with restorative proctocolectomy. Surg Endosc 33, 2293–2303 (2019). https://doi.org/10.1007/s00464-018-6523-3

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