[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100617125":3},{"organization":4,"armGroups":7,"interventions":10,"overallOfficials":10,"centralContacts":15,"locations":21,"responsibleParty":38,"collaborators":10,"id":42,"slug":10,"hasResults":43,"nctId":44,"briefTitle":45,"officialTitle":46,"acronym":47,"eligibilityCriteria":48,"healthyVolunteers":43,"sex":49,"minAge":50,"maxAge":10,"enrollmentInfo":51,"targetDuration":54,"studyType":55,"phases":10,"briefSummary":56,"conditions":57,"keywords":65,"overallStatus":77,"whyStopped":10,"lastUpdateSubmitDate":78,"lastUpdatePostDateStruct":79,"startDateStruct":82,"completionDateStruct":84,"leadSponsor":86,"locationsCount":87},{"fullName":5,"class":6},"LanZhou University","OTHER",[8,12],{"label":9,"type":10,"description":11,"interventionNames":10},"Retrospective Cohort",null,"Patients who underwent endoscopic polyp resection from January 2021 to December 2022, with retrospective data collection and follow-up through December 2025",{"label":13,"type":10,"description":14,"interventionNames":10},"Prospective Cohort","Patients undergoing endoscopic polyp resection from October 2024 to December 2025, with prospective standardized data collection and follow-up through December 2028",[16],{"name":17,"role":18,"phone":19,"phoneExt":10,"email":20},"Qiangqiang Tian","CONTACT","86+15009460497","tianqq2023@lzu.edu.cn",[22],{"facility":23,"status":10,"city":24,"state":25,"zip":26,"country":27,"countryCode":28,"cosmosGeoPoint":29,"geoPoint":34,"contacts":35},"The First Hospital of Lanzhou University","Lanzhou","Gansu","730000","China","CN",{"type":30,"coordinates":31},"Point",[32,33],103.83987,36.05701,{"lat":33,"lon":32},[36],{"name":10,"role":18,"phone":37,"phoneExt":10,"email":20},"15009460497",{"type":39,"investigatorFullName":40,"investigatorTitle":41,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"PRINCIPAL_INVESTIGATOR","Zhaofeng Chen","Clinical Professor","100617125",false,"NCT07314554","Recurrence After Gastric and Intestinal Polyp Resection","Recurrence Rate and Risk Factors After Endoscopic Resection of Gastric and Intestinal Polyps: A Retrospective and Prospective Cohort Study","RAGIP","Inclusion Criteria:\n\n* Age 18 years or older\n* First-time endoscopic examination (gastroscopy or colonoscopy) at the study center\n* Pathologically confirmed polyp of any type (adenomatous, hyperplastic, inflammatory, fundic gland polyp, hamartomatous, serrated lesion)\n* Complete endoscopic resection performed (including EMR, ESD, snare polypectomy, hot biopsy forceps, or argon plasma coagulation)\n* Negative resection margins or complete resection assessed by pathology\n* At least one follow-up endoscopic examination completed (for retrospective cohort) or willingness to complete follow-up (for prospective cohort)\n* Complete baseline clinical data available\n\nExclusion Criteria:\n\n* Hereditary polyposis syndromes (familial adenomatous polyposis, Lynch syndrome, Peutz-Jeghers syndrome, juvenile polyposis syndrome)\n* Inflammatory bowel disease (ulcerative colitis or Crohn's disease)\n* Previous history of gastric or colorectal cancer\n* Cancer detected at initial resection (stage T1b or higher)\n* Non-polyp pathology (e.g., submucosal tumors, normal mucosa)\n* Incomplete resection with positive margins that were not re-treated\n* Lost to follow-up with no available surveillance data (for retrospective cohort)\n* Pregnancy at time of enrollment\n* Inability or unwillingness to provide informed consent (for prospective cohort)","ALL","18 Years",{"count":52,"type":53},2000,"ESTIMATED","3 Years","OBSERVATIONAL","This is a retrospective and prospective cohort study designed to evaluate the recurrence rate and identify risk factors after endoscopic resection of gastric and intestinal polyps.\n\nBACKGROUND: Gastric and intestinal polyps are common digestive diseases with potential for malignant transformation. Although endoscopic resection is the standard treatment, recurrence rates range from 10-50%, and the mechanisms and risk factors remain unclear.\n\nOBJECTIVES:\n\nPrimary: To assess short-term (1-year) and long-term (3-year) recurrence rates after endoscopic polyp resection Secondary: To identify independent risk factors and develop a recurrence risk prediction model\n\nDESIGN: Mixed retrospective-prospective cohort study\n\n* Retrospective cohort: Patients who underwent polyp resection from 2021-2022, with follow-up data through 2024\n* Prospective cohort: Patients enrolled from 2024-2025, with standardized follow-up through 2028\n\nSETTING: Single tertiary referral center with \\>10,000 endoscopic polyp resections performed since 2021\n\nPARTICIPANTS: Approximately 1,600-1,800 adult patients (≥18 years) who underwent complete endoscopic resection of gastric or intestinal polyps\n\nFOLLOW-UP:\n\n* Short-term: 1 year post-resection (±2 months)\n* Long-term: 3 years post-resection (±3 months)\n\nMAIN OUTCOME: Recurrence rate defined as new polyp detection at original or different sites during endoscopic surveillance\n\nPOTENTIAL RISK FACTORS: Patient demographics, polyp characteristics (size, number, location, pathology), resection method, Helicobacter pylori status, lifestyle factors, and medication use\n\nEXPECTED IMPACT: Results will inform personalized surveillance strategies and optimize resource allocation for post-polypectomy follow-up.",[58,59,60,61,62,63,64],"Gastric Polyps","Intestinal Polyps","Colon Polyps","Colorectal Polyps","Adenomatous Polyps","Gastric Adenoma and Early Gastric Cancer","Colorectal Adenoma",[66,67,68,69,70,71,72,73,74,75,76],"Polyp recurrence","Endoscopic resection","Polypectomy","Endoscopic mucosal resection","Endoscopic submucosal dissection","Risk factors","Surveillance","Follow-up","Adenoma","Gastric polyp","Colorectal polyp","NOT_YET_RECRUITING","2026-06-07",{"date":80,"type":81},"2026-06-09","ACTUAL",{"date":83,"type":53},"2026-07-26",{"date":85,"type":53},"2029-02-25",{"name":5,"class":6},1]