Publications by authors named "Nicholas Burgess"

Endoscopic resection of pre-malignant polyps remains a cornerstone of colorectal cancer prevention. This review provides an evidence-based analysis of the current approaches to endoscopic colorectal polyp management. Cold snare resection is recommended for small and diminutive polyps.

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Quality standards for upper gastrointestinal (UGI) endoscopy are required to identify key quality indicators that are relevant to Australasian endoscopic practice and local patient populations. Such standards will promote equitable access to high-quality UGI endoscopy for appropriate indications across Australia and Aotearoa New Zealand. The Gastroenterological Society of Australia (GESA) Endoscopy Faculty's quality of UGI endoscopy working group conducted a review of published guidelines on quality standards in UGI endoscopy.

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Article Synopsis
  • Lesion size (≥40mm) is a significant factor for recurrence after endoscopic mucosal resection, and post-resection margin thermal ablation (MTA) seems to reduce this risk.
  • A study analyzed outcomes across three phases from 2009 to 2023, revealing a notable decrease in recurrence rates after implementing standardized MTA, from 13.5% to 2.1%.
  • MTA effectively equalizes recurrence rates across all polyp sizes (20-39mm, 40-59mm, ≥60mm) when used, suggesting it could be an important strategy for managing larger colorectal polyps.
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Nonlifting large nonpedunculated colorectal polyps (NL-LNPCPs) account for 15% of LNPCPs and are effectively managed by endoscopic mucosal resection (EMR) with adjunctive cold-forceps avulsion with adjuvant snare-tip soft coagulation (CAST). Recurrence rates >10% at surveillance colonoscopy are however a significant limitation. We aimed to compare the outcomes of CAST plus margin thermal ablation (MTA) versus CAST alone for NL-LNPCPs.

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Recurrent cholangitis, intrahepatic stones and biliary and anastomotic strictures are common complications after Roux-en-Y hepaticojejunostomy. The surgically altered anatomy makes management of these complications with endoscopic retrograde cholangiopancreatography technically difficult. We present a case of recurrent cholangitis in a 25-year-old woman with a prior hepaticojejunostomy.

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Background And Aims: The efficacy of colorectal endoscopic mucosal resection (EMR) is limited by recurrence and the necessity for conservative surveillance. Margin thermal ablation (MTA) after EMR has reduced the incidence of recurrence at the first surveillance colonoscopy at 6 months (SC1). Whether this effect is durable to second surveillance colonoscopy (SC2) is unknown.

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Background:  Piecemeal endoscopic mucosal resection (EMR) is an acceptable technique for T1a esophageal adenocarcinoma, but en bloc R0 excision is advocated for T1b disease as it may offer a potential cure and mitigate recurrence. Thus, distinguishing between T1a and T1b disease is imperative under current treatment paradigms. We investigated whether expert Barrett's endoscopists could make this distinction based on optical evaluation.

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Article Synopsis
  • Endoscopic submucosal dissection (ESD) is being considered for treating large nonpedunculated colorectal polyps (LNPCPs) to manage potential low-risk cancers, but its effectiveness in the right colon is unclear.
  • A study analyzed over 3,000 cases, finding that only 2.6% of patients who underwent endoscopic resection (ER) had cancers, with just 0.78% being classified as low-risk.
  • The results suggest that a universal ESD approach for right colon LNPCPs may not significantly improve patient outcomes due to the low prevalence of treatable low-risk cancers.
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Article Synopsis
  • The study discusses the importance of completely removing upper gastrointestinal subepithelial lesions (U-SELs) to ensure accurate diagnosis and eliminate the need for follow-up surveillance.
  • It details a SAFE resection algorithm applied to 106 U-SELs over 115 months, where various methods like endoscopic submucosal dissection (ESD) and submucosal tunneling endoscopic resection (STER) were used depending on the lesion's characteristics.
  • The results showed high success rates for these procedures, with no major complications, suggesting that endoscopic resection is a safe and effective treatment approach for U-SELs.
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Background And Aims: Conventional hot snare endoscopic mucosal resection (H-EMR) is effective for the management of large (≥20 mm) non-pedunculated colon polyps (LNPCPs) however, electrocautery-related complications may incur significant morbidity. With a superior safety profile, cold snare EMR (C-EMR) of LNPCPs is an attractive alternative however evidence is lacking. We conducted a randomised trial to compare the efficacy and safety of C-EMR to H-EMR.

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Background And Aims: Endoscopic submucosal dissection (ESD) is effective in treating early gastric cancer (EGC). Its role in patients with comorbidities along with more advanced disease is unknown. We sought to evaluate this in a large Western cohort.

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Background: Recognition of submucosal invasive cancer (SMIC) in large (≥20 mm) nonpedunculated colonic polyps (LNPCPs) informs selection of the optimal resection strategy. LNPCP location, morphology, and size influence the risk of SMIC; however, currently no meaningful application of this information has simplified the process to make it accessible and broadly applicable. We developed a decision-making algorithm to simplify the identification of LNPCP subtypes with increased risk of potential SMIC.

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Because of concerns about peri-procedural adverse events (AEs), guidelines recommend anesthetist-managed sedation (AMS) for long and complex endoscopic procedures. The safety and efficacy of physician-administered balanced sedation (PA-BS) for endoscopic mucosal resection (EMR) of large non-pedunculated colorectal polyps (LNPCPs) ≥20 mm is unknown. We compared PA-BS with AMS in a retrospective study of prospectively collected data from consecutive patients referred for management of LNPCPs (NCT01368289; NCT02000141).

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Background: Non-achalasia esophageal motility disorders (NAEMDs), encompassing distal esophageal spasm (DES) and hypercontractile esophagus (HCE), are rare conditions. Peroral endoscopic myotomy (POEM) is a promising treatment option. In NAEMDs, unlike with achalasia, the lower esophageal sphincter (LES) functions normally, suggesting the potential of LES preservation during POEM.

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Background And Aims: Although conventional hot snare resection (CR) of laterally spreading lesions of the major papilla (LSL-Ps) is effective, it can be associated with delayed bleeding in upward of 25% of cases. Given the excellent safety profile of cold snare polypectomy in the colorectum, we investigated the efficacy and safety of a novel hybrid resection (HR) technique for LSL-P management, consisting of hot snare papillectomy plus cold snare resection of the laterally spreading component.

Methods: A prospective cohort of patients underwent HR in a tertiary referral center over 60 months until December 2022.

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Background:  Diverticular peroral endoscopic myotomy (POEM) is an alternative to surgery for the management of symptomatic thoracic esophageal diverticula. Conventionally, this requires proximal tunnel formation but a direct approach may simplify the technique. Herein, we report the outcomes of direct diverticular-POEM (DD-POEM).

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