Large or flat colorectal polyps: discussing EMR, ESD or surgery in Shanghai
large flat colorectal polyp EMR ESD surgery Shanghai
Does a large or flat colorectal polyp necessarily require bowel surgery? Advanced endoscopy review in Shanghai can combine colonoscopy images, pathology and prior attempts to compare EMR, ESD and an operation, aiming for treatment that is sufficient without being excessive.
By eastmedgo editorial ·
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Start with the lesion's actual features
Bring the complete colonoscopy report, clear photographs or video if available, biopsy results and records of any previous attempt to remove the lesion. The reviewer needs its size, precise location and surface features, not only the phrase 'large polyp'. Ask whether the rest of the colon was adequately examined and what remains uncertain. Previous treatment may affect the next procedure, so the original intervention report is useful even if removal was incomplete. A consultation should distinguish a technically difficult benign-appearing lesion from one suspicious for invasive cancer.
Why EMR can remain appropriate for a large lesion
Endoscopic mucosal resection removes a lesion through the colonoscope, commonly using fluid to lift the tissue and a snare to cut it. A larger lesion may be removed in several pieces. The 2024 ESGE guideline supports EMR for many large nonpedunculated adenomatous polyps; size alone does not mean ESD is required. Piece-by-piece removal is a planned method in suitable cases, not automatically a failed operation. However, it affects how the specimen is interpreted and makes the follow-up plan for the treated site particularly important.
Sources and references: [1] [2]
When an intact specimen matters more
Endoscopic submucosal dissection uses a specialised cutting technique beneath the lesion to aim for removal in one piece. An intact specimen can be important when the team needs to evaluate suspected superficial invasion and resection margins. The choice depends on the lesion and the centre's expertise; ESD is not a universal upgrade for every flat polyp. Ask why one-piece removal is needed in your case and whether another technique could achieve the same clinical goal. Greater technical complexity must be weighed against the information and treatment benefit expected.
When the discussion needs a colorectal surgeon
If invasive cancer is suspected or found, removing the visible polyp may not answer every cancer-management question. The depth and other pathological features may make further staging and surgical assessment necessary. Surgery may also be considered when safe, adequate endoscopic removal is not feasible. Conversely, being referred for an expert endoscopic opinion does not mean a cancer diagnosis has been made. Ask the team to explain which finding would change the plan from endoscopic treatment to surgery, both before removal and after the final pathology becomes available.
Bleeding and perforation need a practical response plan
EMR and ESD can cause bleeding, a hole in the bowel wall and complications related to sedation or anaesthesia. Incomplete removal or a later residual lesion may require further treatment; some complications need hospital care or surgery. Discuss how the individual lesion and your medicines affect preparation and monitoring. Obtain instructions about eating, activity, prescribed medicines and who should accompany you, rather than borrowing another patient's schedule. Significant or persistent rectal bleeding needs urgent medical attention. The operating team should also explain which abdominal symptoms require immediate assessment.
How advanced endoscopy changes the polyp decision
Renji Hospital, Shanghai Jiao Tong University School of Medicine describes care for gastrointestinal precancerous lesions and early cancer, including EMR and ESD, in its hospital specialty overview. For a difficult colorectal polyp, Shanghai offers an advanced endoscopy opinion alongside pathology and colorectal surgery: is invasion suspected, could piecemeal removal be adequate, when does an intact specimen matter and when should surgery take over? Read about Complex colorectal polyps and bring original colonoscopy images and prior procedure reports so the decision concerns your lesion, not just the phrase “large polyp.”
Sources and references: [4]
Separate diagnostic review from definitive treatment costs
Request an estimate that distinguishes consultation, pathology review, repeat colonoscopy if needed, bowel preparation, sedation or anaesthesia, the proposed resection, consumables, observation or admission and final pathology. Ask how additional treatment and complication care would be charged. Travel should allow for the actual procedure and early review rather than assume immediate departure.
eastmedgo knows the Chinese medical system and can assemble original colonoscopy images, biopsy and earlier removal records, connect you with advanced endoscopy and colorectal surgery, and link the EMR–ESD–surgery choice to final pathology and surveillance colonoscopy. Explore eastmedgo services or contact eastmedgo with your records.
The final pathology completes the treatment decision
Before returning to routine surveillance, obtain an explanation of what was removed, whether the tissue can be fully assessed and whether further treatment is recommended. A check of the resection scar for residual or recurrent tissue and surveillance of the rest of the colon serve related but different purposes. Their timing depends on the lesion, technique and final findings; there is no single interval for all large polyps. Provide the procedure and pathology reports to your local clinician, with clear responsibility for arranging each follow-up and responding to new symptoms.
A complete plan connects the removal method, interpretation of final pathology and the next colonoscopy. Leave Shanghai with these three steps in writing so your local clinician can continue care.
Common questions
Is ESD always better than EMR for a flat polyp?
No. The decision depends on cancer suspicion, whether an intact specimen is needed, the lesion's features and local expertise. EMR is appropriate for many large lesions; the relevant question is which method safely addresses the clinical objective.
Does a benign biopsy exclude cancer in the whole polyp?
A biopsy samples only part of the lesion. The complete endoscopic assessment and pathology of the removed tissue may provide additional information. Ask what uncertainty remains and how the final result could change further treatment.