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Showing 1–24 of 74 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Colonoscopy Biopsy Clear all
Active, not recruiting No phase listed Observational Accepts healthy volunteers

A Study of the Possible Effects of Medication on Young Onset Colorectal Cancer (YOCRC)

NCT05568420
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Not listed
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years to 49 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Regulation of Mucosal Healing in Inflammatory Bowel Disease

NCT04504136
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Serial Biopsy
Procedure
Lead sponsor
Terrence A Barrett
Other
Eligibility
18 Years to 90 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jun 7, 2025 · Synced Sep 6, 2026, 9:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Detection of Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) Activity in Rectal Tissues From Human Subjects

NCT01078740
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Not listed
Lead sponsor
CF Therapeutics Development Network Coordinating Center
Network
Eligibility
18 Years to 75 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
3
States / cities
Birmingham, Alabama • Iowa City, Iowa • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 6, 2013 · Synced Sep 6, 2026, 9:05 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Microbiome in Colorectal Cancer Onset and Progression

NCT05368688
View directory record Official record
Conditions
Colorectal Cancer, Tumor, CRC, GI Cancer, Gastrointestinal Cancer
Interventions
Not listed
Lead sponsor
Viome
Industry
Eligibility
50 Years to 80 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Bellevue, Washington
Source: ClinicalTrials.gov public record
Updated Dec 26, 2022 · Synced Sep 6, 2026, 9:05 AM EDT
Active, not recruiting Phase 3 Interventional

Nivolumab After Combined Modality Therapy in Treating Patients With High Risk Stage II-IIIB Anal Cancer

NCT03233711
View directory record Official record
Conditions
Anal Basaloid Carcinoma, Anal Canal Cloacogenic Carcinoma, Anal Margin Squamous Cell Carcinoma, Stage IIB Anal Cancer AJCC v8, Stage III Anal Cancer AJCC v8
Interventions
Biopsy Procedure, Biospecimen Collection, Colonoscopy, Computed Tomography, Digital Rectal Examination, High Resolution Anoscopy, Magnetic Resonance Imaging, Nivolumab, Patient Observation, Proctoscopy, Sigmoidoscopy, X-Ray Imaging
Procedure · Biological · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
344 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
887
States / cities
Birmingham, Alabama • Anchorage, Alaska • Fairbanks, Alaska + 568 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparative Efficacy of Water & Indigo Carmine vs. Water or Air Method on Adenoma Detection Rate (ADR) - a Randomized Controlled Trial (RCT)

NCT01607255
View directory record Official record
Conditions
Colorectal Neoplasms
Interventions
Indigo carmine, water (exchange) method, water (exchange) plus dye method, air method
Drug · Procedure
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
45 Years to 75 Years
Enrollment
480 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2019 · Synced Sep 6, 2026, 9:05 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

The Effect of PPI Therapy on Weight, Gut Microbiome, and Expression of GPR41 and GPR43

NCT02457104
View directory record Official record
Conditions
Gastroesophageal Reflux Disease, Obesity
Interventions
Colonoscopy, Weight and diet questionnaire
Procedure · Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 59 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 17, 2021 · Synced Sep 6, 2026, 9:05 AM EDT
Active, not recruiting Phase 1 Interventional

Stool Transplant to Control Treatment-related Diarrhea

NCT04883762
View directory record Official record
Conditions
Fecal Microbiota Transplantation (FMT)
Interventions
Fecal Microbiota Transplantation (FMT)
Biological
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

CVD 37000: Immunity and Microbiome Studies at Intestinal and Systemic Sites in Ty21a Vaccinated Adults

NCT03970304
View directory record Official record
Conditions
Typhoid Vaccination
Interventions
Vivotif Typhoid Oral Vaccine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

CVD 38000: Study of Responses to Vaccination With Typhoid and/or Cholera

NCT03705585
View directory record Official record
Conditions
Typhoid and/or Cholera Vaccination
Interventions
Vivotif Typhoid Oral Vaccine, Vaxchora
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Not listed Phase 1 Interventional

Reduction of C-Difficile Infection Using Stool Transplant

NCT02112279
View directory record Official record
Conditions
C-difficile
Interventions
Donor microbiota applied via colonoscopy.
Biological
Lead sponsor
Providence Holy Cross Medical Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Mission Hills, California
Source: ClinicalTrials.gov public record
Updated Jan 7, 2015 · Synced Sep 6, 2026, 9:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Experimental Device to Improve Colonoscopy

NCT00719641
View directory record Official record
Conditions
Colonoscopy, Looping, Prevent Looping, Colon Cancer Screening
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
40 Years to 80 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 23, 2020 · Synced Sep 6, 2026, 9:05 AM EDT
Recruiting Phase 2 Interventional

FOLFOX, Botensilimab, and Balstilimab for the Treatment of Localized Rectal Cancer Before Surgery

NCT06780787
View directory record Official record
Conditions
Rectal Adenocarcinoma, Stage IIA Rectal Cancer AJCC v8, Stage III Rectal Cancer AJCC v8
Interventions
Balstilimab, Biospecimen Collection, Botensilimab, Capecitabine, Computed Tomography, Digital Rectal Examination, Endoscopic Biopsy, Fluorouracil, Leucovorin Calcium, Magnetic Resonance Imaging, Oxaliplatin, Radiation Therapy, Sigmoidoscopy
Biological · Procedure · Drug + 1 more
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Recruiting Phase 1 Interventional

Testing for Safety and Colorectal Cancer Preventive Effects of ONC201

NCT05630794
View directory record Official record
Conditions
Colorectal Adenomatous Polyp, Colorectal Carcinoma, Familial Adenomatous Polyposis, Multiple Adenomatous Polyps
Interventions
Biopsy Procedure, Biospecimen Collection, Colonoscopy, Dordaviprone Hydrochloride, Questionnaire Administration, Sigmoidoscopy
Procedure · Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
5
States / cities
Ann Arbor, Michigan • St Louis, Missouri • Cleveland, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Completed Not applicable Interventional

Evaluating the Safety and Effectiveness of the Flex Robotic System for the Surgical Removal of Colorectal Lesions

NCT05674123
View directory record Official record
Conditions
Colorectal Neoplasm
Interventions
Colonoscopy, Endoscopic Ultrasound, Medical Chart Review, Medical Device Usage and Evaluation, Resection
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
22 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 11, 2023 · Synced Sep 6, 2026, 9:05 AM EDT
Active, not recruiting No phase listed Observational

The Colonic Microbiome and Mucosal Immunity in Inflammatory Bowel Disease and Ankylosing Spondylitis

NCT02389075
View directory record Official record
Conditions
Inflammatory Bowel Diseases (IBD), Ankylosing Spondylitis (AS)
Interventions
Pinch biopsies, Flexible sigmoidoscopy
Procedure
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2026
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Sep 6, 2026, 9:05 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Pilot Study of Stomach Cancer Early Detection and Prevention With Endoscopy

NCT05566899
View directory record Official record
Conditions
Gastric Cancer
Interventions
esophagogastroduodenoscopy (EGD)
Procedure
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
40 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Sep 6, 2026, 9:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Optical Diagnosis Versus Laser Measurement of Polyps' Size During Colonoscopy and Implications for Surveillance

NCT05489380
View directory record Official record
Conditions
Colorectal Polyp
Interventions
AccuMeasure
Device
Lead sponsor
Radboud University Medical Center
Other
Eligibility
18 Years and older
Enrollment
138 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
2
States / cities
Indianapolis, Indiana • New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Active, not recruiting Phase 2 Interventional

Testing a Combination of Vaccines for Cancer Prevention in Lynch Syndrome

NCT05419011
View directory record Official record
Conditions
Colorectal Carcinoma, Colorectal Neoplasm, Lynch Syndrome
Interventions
Adenovirus 5 CEA/MUC1/Brachyury Vaccine Tri-Ad5, Biopsy Procedure, Biospecimen Collection, Colonoscopy, Nogapendekin Alfa, Placebo Administration, Questionnaire Administration
Biological · Procedure · Drug + 1 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
186 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
13
States / cities
Phoenix, Arizona • Tucson, Arizona • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Completed Phase 1 Interventional

Study of KCC Peptide Application in the Colon

NCT02156557
View directory record Official record
Conditions
Colon Polyps, Colorectal Cancer, Inflammatory Bowel Disease (IBD)
Interventions
Colon KCC Heptapeptide
Biological
Lead sponsor
Danielle Kim Turgeon
Other
Eligibility
18 Years to 100 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Sep 6, 2026, 9:05 AM EDT
Enrolling by invitation No phase listed Observational

Physiologic and Functional Adaptations of Insulin Sensitive Tissues

NCT03407833
View directory record Official record
Conditions
Diabetes, Insulin Resistance, Obesity, Bariatric Surgery Candidate, Roux-en-y Gastric Bypass, Liver Diseases
Interventions
Endoscopy biopsy, Surgical biopsy, Mixed-meal tolerance test, Excised Liver Tissue Sampling
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 6, 2026, 9:05 AM EDT
Active, not recruiting Phase 2 Interventional

Testing Atorvastatin to Lower Colon Cancer Risk in Longstanding Ulcerative Colitis

NCT04767984
View directory record Official record
Conditions
Colorectal Carcinoma, Ulcerative Colitis
Interventions
Atorvastatin Calcium, Biopsy of Colon, Biospecimen Collection, Placebo Administration, Questionnaire Administration
Drug · Procedure · Other
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 70 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
3
States / cities
Chicago, Illinois • Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 20, 2026 · Synced Sep 6, 2026, 9:05 AM EDT
Completed No phase listed Observational Results available

Comparison of Virologic and Immunologic Responses to Raltegravir and Dolutegravir in the Gastrointestinal Tract of HIV-Positive Adults

NCT02218320
View directory record Official record
Conditions
Human Immunodeficiency Virus
Interventions
Raltegravir, Dolutegravir, Colonoscopy with biopsy
Drug · Procedure
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 25, 2018 · Synced Sep 6, 2026, 9:05 AM EDT
Terminated Not applicable Interventional

Study of Performance of Confocal Endomicroscope With Fluorescein Imaging Agent in the Colon

NCT03220711
View directory record Official record
Conditions
Colonic Dysplasia, Adenomatous Polyps, Irritable Bowel Disease
Interventions
confocal endomicroscope, Fluorescein
Device · Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 100 Years
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 21, 2022 · Synced Sep 6, 2026, 9:05 AM EDT