24/07/2026
Endoscopic Polypectomy: Techniques, Devices and Safety
Endoscopic polypectomy is the gold-standard procedure for colorectal polyp removal. Explore techniques, clinical indications, and the devices that ensure procedural safety.
08/06/2026
Published by Meditalia
Polypectomy is one of the most frequently performed endoscopic procedures in gastroenterology and remains the cornerstone of secondary prevention of colorectal cancer (CRC). In Europe, approximately 30–40% of patients undergoing screening colonoscopy are found to harbour at least one adenomatous polyp.
Their timely removal reduces CRC incidence by up to 76–90%, according to data from the National Polyp Study — one of the most influential trials in the history of gastrointestinal endoscopy.
From a clinical standpoint, polypectomy transforms colonoscopy from a purely diagnostic examination into a therapeutic intervention, eliminating potentially pre-malignant lesions within a single procedure. The choice of resection technique depends on several variables: polyp morphology (according to the Paris classification), size, location, surface characteristics, and operator experience.
The ESGE Guidelines on endoscopic polypectomy (2017, updated 2022) provide detailed, evidence-based recommendations on resection techniques tailored to lesion characteristics, with the dual aim of maximising resection radicality and minimising procedural complication rates.
Polyp Classification and Its Impact on Technique Selection
Before planning a polypectomy, the endoscopist must carefully assess the morphology of the lesion. The Paris classification distinguishes polypoid lesions — pedunculated (Ip), semipedunculated (Isp), and sessile (Is) — from non-polypoid ones, including flat elevated (IIa), truly flat (IIb), and depressed (IIc) lesions. This classification has direct implications for both the choice of resection technique and the estimated risk of submucosal invasion.
Polyp size is another key variable. Lesions are conventionally categorised as diminutive (≤5 mm), small (6–9 mm), and large (≥10 mm). Each category carries specific technical indications, and the resection of diminutive polyps — the most numerically prevalent category in screening colonoscopies — has attracted growing attention in the literature due to ongoing debate around efficacy, safety, and cost-effectiveness.
Polypectomy Techniques: from snare eesection to cold snaring
Cold Snare Polypectomy: The Reference Standard for Diminutive and Small Polyps
Cold snare polypectomy (CSP) is currently the technique recommended by ESGE guidelines for the removal of diminutive and small polyps (≤9 mm). The procedure involves positioning a wire snare around the base of the polyp and closing it mechanically, without the application of electrical current (diathermy).
Compared to conventional hot snare techniques, CSP offers a lower risk of delayed post-procedural bleeding, shorter procedure times, and the complete elimination of thermal injury-related risks. Resection radicality is comparable to hot snare polypectomy for appropriately sized lesions, provided that a small rim of normal surrounding mucosa is included within the snare.
Hot Snare Polypectomy and EMR for Larger Lesions
For sessile polyps between 10 and 19 mm, endoscopic mucosal resection (EMR) is the technique of choice. The procedure involves submucosal injection of a lifting solution — saline, hyaluronic acid, or glycerol — to elevate the polyp from the muscularis propria, creating a protective submucosal cushion that facilitates snare resection and significantly reduces the risk of perforation.
For large pedunculated polyps, hot snare polypectomy using a blended or coagulation current remains the standard approach. When the stalk diameter exceeds 10 mm, preventive placement of a detachable snare loop or intrastalk adrenaline injection is recommended to reduce the risk of immediate or delayed post-polypectomy bleeding.
Endoscopic Submucosal Dissection (ESD)
Endoscopic submucosal dissection (ESD) is reserved for lesions ≥20 mm that cannot be resected en bloc by EMR, for lesions with surface features suggesting superficial submucosal invasion (Paris IIc or Vc pattern), and for recurrent adenomas after prior polypectomy. ESD requires operators with a specific learning curve and is best performed in high-volume referral centres with dedicated equipment.
Polypectomy and Diminutive Polyp Resection: An Evolving Debate
The management of diminutive polyps deserves specific attention in contemporary digestive endoscopy. These lesions represent the overwhelming majority of polyps detected during screening colonoscopies, yet their malignant potential is extremely low — estimated at less than 1% in the available literature.
The current clinical debate centres on two alternative management strategies: the resect-and-discard approach (resection without histopathological analysis for low-risk lesions, with significant cost savings) and the diagnose-and-leave strategy (real-time optical diagnosis using chromoendoscopy or narrow-band imaging, without resection).
Both strategies are being validated in international screening programmes and require high-definition endoscopic equipment and operators certified in optical diagnosis.
The Role of Medical Devices in Polypectomy
The quality and safety of a polypectomy procedure depend significantly on the endoscopic accessories used. The single-use endoscopic accessories for digestive endoscopy distributed by Meditalia S.r.l. — including cold and hot snares, submucosal injection needles, haemostatic clips, and retrieval devices — are designed to meet the technical requirements of a wide range of resection techniques, from standard procedures to the most complex interventions.
The use of CE-certified single-use devices, in compliance with EU MDR Regulation 2017/745, ensures full traceability, eliminates the risk of cross-contamination between patients, and guarantees consistent, reproducible device performance. Meditalia supports endoscopy centres with a comprehensive range of accessories compatible with the leading endoscopic platforms on the Italian and European markets.
Complication Management: Bleeding and Perforation
Polypectomy complications are uncommon but require prompt management and shared protocols within the endoscopic team. Immediate and delayed bleeding. Immediate haemorrhage occurs in fewer than 1% of cold snare polypectomies and is more frequent with hot snare techniques and large pedunculated polyps. Delayed bleeding — occurring within two weeks — may present as haematochezia and requires endoscopic reassessment. Management options include haemostatic clip placement, adrenaline injection, and argon plasma coagulation.
Perforation. Occurs in 0.1–0.5% of complex resections (EMR/ESD). When recognised intra-procedurally, endoscopic closure with through-the-scope clips is often definitive, avoiding the need for surgical intervention.
Post-polypectomy syndrome. A rare complication characterised by localised abdominal pain and fever within 12–24 hours of the procedure, in the absence of frank perforation, caused by transmural thermal injury. Management is conservative.
Post-Polypectomy Surveillance
Following the removal of adenomatous polyps, patients are enrolled in an endoscopic surveillance programme. Recommended intervals according to ESGE 2020 Post-Polypectomy Surveillance Guidelines are as follows:
- Low-risk adenoma (1–2 tubular adenomas, <10 mm, low-grade dysplasia): surveillance colonoscopy at 5–10 years.
- High-risk adenoma (≥3 adenomas, or ≥10 mm, or high-grade dysplasia, or villous component): follow-up at 3 years.
- Large adenoma (≥20 mm) resected piecemeal: early surveillance at 3–6 months to assess resection completeness.
Conclusion & FAQ
La polipectomia endoscopica è una procedura sicura ed efficace che costituisce il principale strumento di prevenzione attiva del carcinoma colorettale. La scelta della tecnica più appropriata — dal cold snaring per i polipi diminutivi all’ESD per le lesioni complesse — richiede competenza clinica, tecnologia endoscopica avanzata e dispositivi medici affidabili.
Meditalia S.r.l. è al fianco dei professionisti dell’endoscopia digestiva con accessori e dispositivi certificati per ogni fase della procedura. Consulta il nostro sito web o contatta il nostro team commerciale per informazioni tecniche e disponibilità.
What is endoscopic polypectomy and what is it used for?
Endoscopic polypectomy is the removal of colorectal polyps performed during a colonoscopy. It is a therapeutic procedure that eliminates potentially pre-malignant lesions without the need for surgery, representing the primary tool for colorectal cancer prevention.
Which technique is recommended for the resection of diminutive polyps?
For diminutive polyps (≤5 mm) and small polyps (6–9 mm), the ESGE-recommended technique is cold snare polypectomy (CSP), which uses a wire snare without electrical current. It offers high resection radicality with a superior safety profile compared to diathermy-based techniques.
Is polypectomy painful?
Polypectomy is performed during colonoscopy under conscious or deep sedation. The patient does not experience pain during the procedure. Mild abdominal cramping may occur in the following hours and typically resolves spontaneously.
Is a special diet required after polypectomy?
Yes. In the 24–48 hours following the removal of large polyps or resections performed with hot techniques, a liquid or soft diet is recommended to reduce the risk of delayed bleeding. The gastroenterologist will provide personalised dietary instructions at discharge.
How frequently should colonoscopy be repeated after polypectomy?
The surveillance interval depends on the number, size, and histological characteristics of the removed polyps. According to ESGE 2020 guidelines, it ranges from 3–6 months (for piecemeal resection of large lesions) to 5–10 years (for single low-risk adenomas).
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