Clinical trials
Colorectal (Colon or Rectal) Cancer clinical trials
Below are recruiting colorectal (colon or rectal) cancer clinical trials, each written for real people, not researchers. We’re tracking 867 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07198945Enrolling by invitation
6 vs 12 month follow-up after large colon polyp removal
This trial compares whether a follow-up colonoscopy at 6 or 12 months is better for people who have had a large polyp (20-50 mm) removed. It will help doctors understand the best timing for surveillance.
Birmingham, AlabamaAges 18 years+ - NCT07095517RecruitingPhase 1
Preventing early-onset colorectal tumors with tirzepatide
This study tests if tirzepatide can help prevent early-onset colorectal tumors in people aged 18-50 who have had certain types of polyps removed. It aims to find risk factors and ways to stop colorectal cancer before it starts.
Boston, MassachusettsAges 18–50 - NCT07050485Enrolling by invitation
Postbiotic gummies after GI cancer surgery
This trial tests if taking postbiotic gummies (a type of supplement that helps good gut bacteria) can help your gut recover faster after surgery for stomach, colon, or other gastrointestinal cancers. It is for people having scheduled, minimally invasive (laparoscopic) surgery to remove their cancer.
Tampa, FloridaAges 18 years+ - NCT06843434RecruitingPhase 2
Study of two immunotherapy drugs for rectal cancer
This trial tests a combination of two immunotherapy drugs, botensilimab and balstilimab, for people with newly diagnosed rectal adenocarcinoma that has not spread. The goal is to see if this treatment can shrink the tumor before surgery.
Basking Ridge, New JerseyAges 18 years+ - NCT06708429Recruiting
Lynch syndrome and gut immune system study
This study looks at how the immune system interacts with the gut lining in people with Lynch syndrome and those without. It may help us better understand how Lynch syndrome affects the body.
Monrovia, CaliforniaAges 18 years+ - NCT06458998Enrolling by invitation
Improving cancer screening for veterans
This study looks at ways to help veterans get screened for liver cancer (hepatocellular carcinoma) and colorectal cancer. The goal is to see if certain programs or tools can make it easier for veterans to complete these important cancer screenings.
Pittsburgh, PennsylvaniaAges 18 years+ - NCT06402864RecruitingPhase 3
Internal radiation for rectal preservation in intermediate rectal cancer
This study is testing whether a special internal radiation treatment (contact X-ray brachytherapy) can help people with intermediate-stage rectal cancer avoid surgery and keep their rectum intact. It is for patients who are also receiving mFolfirinox chemotherapy.
Avignon, FranceAges 18–99 - NCT04074720Recruiting
Collecting breast cancer tissue and blood samples
This study collects tissue and/or blood samples from people with breast cancer to help future research. It may be useful if you’re already having surgery or another procedure as part of your treatment plan.
Philadelphia, PennsylvaniaAges 18 years+ - NCT05652348Recruiting
Predicting outcomes after heated chemotherapy for stomach or colon spread
This study tries to better predict how well patients do after heated chemotherapy placed in the abdomen during surgery for stomach or colon cancer that has spread to the lining of the abdomen. It may help doctors choose the best treatment plan and timing for future patients.
BerlinAges 18 years+ - NCT04722341Recruiting
Time-limited eating for people with certain breast or rectal cancers
This study tests whether eating only within a shorter daily time window can improve cancer outcomes in people with specific breast or rectal cancers. It also looks at how this affects the body (such as metabolism) and who is most likely to benefit.
Birmingham, AlabamaAges 18 years+ - NCT05438563Recruiting
MRI-guided prostate cancer ablation with ultrasound from the urethra
This trial tests a newer way to treat certain low- to intermediate-risk prostate cancers using MRI guidance and an ultrasound probe placed through the urethra. It aims to destroy the tumor while using imaging to help target it more precisely.
Rochester, MinnesotaAges 45–80 - NCT05411718RecruitingPhase 2
Aspirin or naproxen to prevent cancer in Lynch syndrome
This trial tests whether daily aspirin or naproxen can “intercept” (stop) cancer from starting or coming back in people with Lynch syndrome who are currently cancer-free. Participants are randomly assigned to one of the two drugs, and neither the participant nor the team knows which one you’re taking.
Houston, TexasAges 18 years+ - NCT05402696Recruiting
Study of advanced surgery care for colorectal tumors
This study follows adults who are referred for treatment of a specific type of colorectal tumor that involves the left side of the colon. It aims to improve care and outcomes for people needing advanced surgery.
Saint Cloud, MinnesotaAges 18 years+ - NCT05176483RecruitingPhase 1
New drug combinations for advanced solid tumors
This trial tests a new drug called zanzalintinib, which may slow or shrink various types of advanced cancer. It is given together with other cancer treatments, and the study is looking at many different cancers including kidney, prostate, bladder, lung, liver, and more.
Phoenix, ArizonaAges 18 years+ - NCT03303833Recruiting
Lynch syndrome study following people over time
This study follows adults with Lynch syndrome (an inherited gene change) using regular questionnaires and tracking health over time. It may help researchers understand how the condition progresses and improve care for people with these gene mutations.
WageningenAges 18–80 - NCT03961776Recruiting
MRI to monitor treatment response in rectal cancer
This trial tests whether an MRI scan done during chemoradiation can help doctors track how rectal cancer treatment is working. It may improve how they measure response early so treatment planning can be better tailored.
Los Angeles, CaliforniaAges 18 years+ - NCT05563922RecruitingPhase 2
Testing a plan to preserve the anus after rectal chemo-radiation
This Phase 2 study tests a “total neoadjuvant” (chemo plus radiation before the main treatment) plan to see if some people with low rectal cancer can keep their anus. It may help you avoid permanent colostomy if your cancer responds well and you meet the study rules.
Shanghai, Shanghai MunicipalityAges 18–75 - NCT05597852Recruiting
Rectal gel spacer to help repeat prostate radiation
This trial studies whether placing a soft gel spacer near the rectum can make “salvage” prostate radiation safer and more tolerable when prostate cancer comes back locally. It may help reduce side effects by creating extra space between the rectum and the radiation area.
Toronto, OntarioAges 18 years+ - NCT05236972RecruitingPhase 3
PD-1 antibody after colon cancer surgery for dMMR stage III
This phase 3 trial studies a PD-1 antibody medicine given after surgery to help prevent stage III colon cancer from coming back. It is specifically for people whose tumor is mismatch repair–defective (dMMR) or MSI-H, which may make the cancer more responsive to immune-based treatment.
GuangzhouAges 18–75 - NCT05853094Recruiting
Testing different ways to create a stoma after rectal cancer surgery
This trial looks at how different stoma (opening in the belly) approaches affect recovery after curative rectal cancer surgery. It may help doctors choose the safest, most comfortable option for bowel function and healing after surgery.
ShanghaiAges 18–80 - NCT05914389RecruitingPhase 2
Immunotherapy plus chemotherapy before surgery for colon cancer
This Phase 2 trial studies giving chemotherapy plus immune therapy before surgery for certain colon cancers that do not have mismatch repair defects (MSS/pMMR). The goal is to shrink and control the tumor and improve outcomes compared with standard approaches.
Hangzhou, ZhejiangAges 18–75 - NCT05984576Recruiting
Chemo and radiation for recurrent rectal cancer after prior pelvic radiation
This study looks at combining total neoadjuvant therapy (chemotherapy and radiation) for rectal cancer that has come back in the pelvis after earlier radiation. It aims to see if this treatment approach can help control the disease and improve outcomes in patients with limited spread that can potentially be removed or treated.
RomeAges 18 years+ - NCT05871762Recruiting
Choosing best treatment plans for mid-to-low rectal cancer
This trial studies how to choose the best treatment strategy for people with rectal cancer located in the middle to lower part of the rectum. It may help doctors match the right treatment plan to tumor location and your overall situation.
Beijing, Beijing MunicipalityAges Any age - NCT03125343Recruiting
Watch-and-wait after rectal cancer treatment for select patients
This study looks at whether some people with rectal cancer can safely avoid immediate surgery after (chemo)radiation, instead closely monitoring their response. It may help some patients reduce treatment burden if the cancer fully responds.
GothenburgAges 18 years+
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Common questions
- Are there clinical trials for colorectal (colon or rectal) cancer?
- Yes. Clin2 currently lists 867 recruiting colorectal (colon or rectal) cancer studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a colorectal (colon or rectal) cancer trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a colorectal (colon or rectal) cancer trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.