Publications by authors named "Martin Dahan"

Introduction: The adoption of colorectal endoscopic submucosal dissection (ESD) is still limited in the West. A recent randomized trial showed that ESD is more effective and only slightly riskier than piecemeal endoscopic mucosal resection; reproducibility outside expert centers was questioned. We evaluated the results according to the annual case volume in a multicentric prospective cohort.

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Background: Endoscopic resection of adenomas prevents colorectal cancer, but the optimal technique for larger lesions is controversial. Piecemeal endoscopic mucosal resection (EMR) has a low adverse event (AE) rate but a variable recurrence rate necessitating early follow-up. Endoscopic submucosal dissection (ESD) can reduce recurrence but may increase AEs.

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Article Synopsis
  • * MRS significantly lowered the curative resection rate (41.6%) compared to lesions without MRS (81.3%) and increased rates of perforation and need for secondary surgeries.
  • * The study suggests that if MRS is detected, ESD should be halted for colon lesions due to poor outcomes but can continue for rectal lesions due to higher risks associated with alternative treatments.
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Background: Clinically significant delayed bleeding (CSDB) is a frequent, and sometimes severe, adverse event after colorectal endoscopic submucosal dissection (ESD). We evaluated risk factors of CSDB after colorectal ESD.

Methods: We analyzed a prospective registry of 940 colorectal ESDs performed from 2013 to 2022.

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Background: EUS-guided choledoco-duodenostomy using electrocautery-enhanced lumen-apposing metal stents (ECE-LAMS) is becoming the gold standard in case of endoscopic retrograde cholangio-pancreatography failure for distal malignant obstruction. Long-term data in larger samples are lacking.

Methods: This was a prospective monocentric study including all patients who underwent EUS-guided choledochoduodenostomy (CDS) between September 2016 and December 2021.

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Background And Aims: Endoscopic management is preferred to surgical management for large superficial colorectal lesions. However, the optimal endoscopic resection strategy (piecemeal endoscopic mucosal resection [pEMR] or endoscopic submucosal dissection [ESD]) is still debated from an economical point of view. To date, in France, there is no Health Insurance reimbursement rate for the hospital stays related to ESD.

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Introduction: Optical diagnosis is necessary when selecting the resection modality for large superficial colorectal lesions. The COlorectal NEoplasia Endoscopic Classification to Choose the Treatment (CONECCT) encompasses overt (irregular pit or vascular pattern) and covert (macroscopic features) signs of carcinoma in an all-in-one classification using validated criteria. The CONECCT IIC subtype corresponds to adenomas with a high risk of superficial carcinoma that should be resected en bloc with free margins.

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Background And Aims: Colonic endoscopic submucosal dissection (ESD) is particularly challenging and limited to a few expert centers. We recently conducted a pilot study on improvement of colonic ESD with systematic use of a countertraction device (double-clip traction with rubber band [DCT-ESD]).

Methods: A French prospective multicenter study was conducted between March 2017 and September 2019, including all consecutive cases of naive colonic ESD.

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Introduction: In Western countries, debates between ESD vs piece-meal EMR as the best treatment for large colorectal adenomas persist regarding the difficulty of ESD the colon, and the safety and relatively good results of piece-meal endoscopic mucosal resection (EMR). Pocket-creation method (PCM) and double-clip countertraction (DCT) are two strategies recently published to facilitate ESD in this challenging situation.

Method: This is a randomized animal study to compare PCM and DCT strategies for colonic ESD on ex vivo models (bovine colon) performed by 3 operators novice in ESD.

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Introduction: Surgical management is too often performed as the first-line treatment for large, benign colorectal polyps. We report the management of benign lesions detected by organised colorectal cancer (CRC) screening.

Methods: Population-based study in 2012, 2016, and 2017, analyzing the evolution of surgical management of benign polyps of≥2cm diameter discovered in the context of organised CRC screening after the implementation of a regional referral network for the management of superficial colorectal lesions.

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Background And Aim: Acute gastrointestinal bleeding carries poor outcomes unless prompt endoscopic hemostasis is achieved. Mortality in these patients remains significant. Hemospray is a novel intervention that creates a mechanical barrier over bleeding sites.

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Introduction: Endoscopic submucosal dissection (ESD) is the gold-standard treatment for superficial lesions of the digestive tract. No medico-economic study has been conducted in Europe.

Material And Methods: A monocentric study was conducted including all patients undergoing ESD between January 2015 and December 2017.

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