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Showing 1–24 of 35 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Biopsies during colonoscopy 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM 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 7, 2026, 5:17 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microbiome-Mediated Gut Dysfunction in Non-Alcoholic Fatty Liver Disease

NCT05209100
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease
Interventions
Sigmoidoscopy
Procedure
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
35 Years to 65 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Sep 7, 2026, 5:17 PM EDT
Recruiting No phase listed Observational

Colonic Tissue Biopsy Detection of Phosphorylated Alpha-synuclein for Parkinson's Diagnosis or REM Sleep Behavior Disorder

NCT07217054
View directory record Official record
Conditions
PARKINSON DISEASE (Disorder), Parkinson, Parkinson s Disease, Parkinson Disease
Interventions
Not listed
Lead sponsor
CND Life Sciences
Other
Eligibility
40 Years to 99 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Branford, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 10, 2026 · Synced Sep 7, 2026, 5:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Cold Forcep and Cold Snare Polypectomy for Polyps Less Than or Equal to 3mm in Size During Colonoscopy

NCT04551001
View directory record Official record
Conditions
Colo-rectal Cancer, Polyp of Colon, Adenomatous Polyp of Colon
Interventions
Cold forcep polypectomy, Cold snare polypectomy
Procedure
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
181 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated May 16, 2022 · Synced Sep 7, 2026, 5:17 PM EDT
Recruiting Not applicable Interventional

Testing the Effects of Exercise on Colorectal Cancer Development After Treatment With Pelvic Radiation Therapy for Prostate Cancer

NCT07790718
View directory record Official record
Conditions
Colon Polyp, Colorectal Carcinoma, Localized Prostate Carcinoma, Stage I Prostate Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage III Prostate Cancer AJCC v8
Interventions
Aerobic Exercise, Biopsy Procedure, Biospecimen Collection, Colonoscopy, Data Collection, Physical Performance Testing, Questionnaire Administration, Sigmoidoscopy, Survey Administration
Other · Procedure
Lead sponsor
City of Hope Medical Center
Other
Eligibility
40 Years to 80 Years · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
2
States / cities
Duarte, California • Irvine, California
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 7, 2026, 5:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness and Safety of the Colonoscopy With "Visualization" Balloon

NCT02117232
View directory record Official record
Conditions
Colonic Adenomatous Polyps
Interventions
Visualization balloon, Traditional CO2 insufflation colonoscopy
Device
Lead sponsor
Mercy Medical Center
Other
Eligibility
17 Years to 90 Years
Enrollment
216 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 20, 2018 · Synced Sep 7, 2026, 5:17 PM EDT
Completed Phase 2 Interventional Results available

Fecal Microbiota Transplant (FMT) in Melanoma Patients

NCT03341143
View directory record Official record
Conditions
Melanoma
Interventions
Fecal Microbiota Transplant with Pembrolizumab
Drug
Lead sponsor
Zarour, Hassane, MD
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 29, 2024 · Synced Sep 7, 2026, 5:17 PM EDT
Completed No phase listed Observational

The Role of the Pregnane X Receptor (PXR) in Indole Signaling and Intestinal Permeability in Inflammatory Bowel Disease

NCT04089501
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Stool collection, Biopsy collection
Diagnostic Test
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
Up to 65 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 15, 2019 · Synced Sep 7, 2026, 5:17 PM EDT
Completed No phase listed Observational

Calcium/Vitamin D, Biomarkers & Colon Polyp Prevention

NCT00399607
View directory record Official record
Conditions
Colorectal Adenomatous Polyps
Interventions
Rectal biopsy during colonoscopy, Rectal biopsy at randomization, Rectal biopsy at 1 year, Rectal biopsy prior to colonoscopy, Biopsies during colonoscopy
Procedure
Lead sponsor
Emory University
Other
Eligibility
45 Years to 75 Years
Enrollment
264 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
9
States / cities
Los Angeles, California • Denver, Colorado • Atlanta, Georgia + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2016 · Synced Sep 7, 2026, 5:17 PM EDT
Recruiting No phase listed Observational

A Biospecimen Collection Study to Identify the Targets of Disease-Reactive T Cells in Patients With Autoimmune Disease

NCT06587828
View directory record Official record
Conditions
Autoimmune Diseases, Ulcerative Colitis, Multiple Sclerosis, Scleroderma, Ankylosing Spondylitis, Celiac Disease, Non-radiographic Axial Spondyloarthritis (Nr-axSpA), Crohn&Amp;#39;s Disease, Birdshot Chorioretinitis
Interventions
Companion blood samples with procedure
Procedure
Lead sponsor
TScan Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
11
States / cities
Orange, California • Sherman Oaks, California • Skokie, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2025 · Synced Sep 7, 2026, 5:17 PM EDT
Active, not recruiting Phase 2Phase 3 Interventional

Testing the Addition of an Anti-Cancer Drug, Irinotecan, to the Standard Chemotherapy Treatment (FOLFOX) After Long-Course Radiation Therapy for Advanced-Stage Rectal Cancers to Improve the Rate of Complete Response and Long-Term Rates of Organ Preservation and Continuing Response

NCT05610163
View directory record Official record
Conditions
Stage II Rectal Cancer AJCC v8, Stage III Rectal Cancer AJCC v8, Locally Advanced Rectal Adenocarcinoma
Interventions
Capecitabine, 5-fluorouracil, Leucovorin calcium, Irinotecan, Oxaliplatin, Long Course Chemoradiotherapy, Computed Tomography, Magnetic Resonance Imaging, Sigmoidoscopy, biopsy
Drug · Radiation · Procedure
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older
Enrollment
760 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2033
U.S. locations
679
States / cities
Birmingham, Alabama • Mobile, Alabama • Anchorage, Alaska + 483 more
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 7, 2026, 5:17 PM EDT