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 900 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04190589Recruiting
Robotic right-sided colon surgery for early to mid-stage cancer
This study looks at a newer, robot-assisted surgical approach to remove part of the right colon completely when colon cancer is suspected or confirmed. It may help by aiming for more complete tumor removal while tracking safety and outcomes.
VejleAges 18 years+ - NCT04749108RecruitingPhase 2/Phase 3
Tailored treatment for locally advanced rectal cancer after FOLFIRINOX
This trial studies a more customized treatment plan for people with locally advanced rectal (bowel) cancer after they receive FOLFIRINOX chemotherapy. It aims to reduce tumor spread risk and improve outcomes by tailoring the next steps based on scan details and your health status.
Marseille, Bouches Du RhôneAges 18 years+ - NCT04808323RecruitingPhase 1
MRI-guided radiation to help preserve organs in rectal cancer
This Phase 1 study tests a radiation treatment approach guided by MRI scans to help keep nearby organs functioning while treating rectal cancer. It is designed to find a safe, effective way to target the tumor and adjust treatment during the course of therapy.
Milwaukee, WisconsinAges 18 years+ - NCT04927897Recruiting
Testing where to aim extra rectal radiation before surgery
This trial tests the best place to target an “extra boost” of radiation inside the rectum for certain rectal cancer patients. It may help guide more precise treatment planning before they have total mesorectal excision (TME) surgery.
Maastricht, LimburgAges 18 years+ - NCT04936581Recruiting
Quality of life after rectal cancer surgery
This study looks at patient-reported outcomes—how you feel and function—after surgery for rectal cancer. It may help doctors better understand recovery and well-being after different surgical approaches and treatments.
MadridAges 18–100 - NCT05059444Recruiting
Blood test study to watch for cancer coming back
This study looks at whether blood tests can detect signs that cancer may return after curative-intent treatment. You would have blood drawn around your usual follow-up visits for up to 5 years, and your de-identified health data would be shared with study investigators.
Birmingham, AlabamaAges 18 years+ - NCT05168839RecruitingPhase 3
Using dye scans during surgery to help prevent leakage
This trial tests whether using a special dye and camera during colorectal cancer surgery can help lower the risk of a surgical “leak” where the bowel is joined. If you’re having a planned left-sided colectomy or high rectal resection, the scan may help surgeons see blood flow more clearly.
AmiensAges 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 - NCT05410977Recruiting
Testing blood and stool for colon cancer in Lynch syndrome
This study collects blood and stool samples to see how well they can detect colorectal cancer or advanced growths in people with Lynch syndrome (an inherited colon cancer risk) or suspected Lynch syndrome. It may help find cancer or precancer earlier, which can improve next-step decisions.
Scottsdale, ArizonaAges 18 years+ - NCT05447923Recruiting
Colorectal screening study for Black and underserved Phoenix adults
This study aims to help improve colorectal cancer screening (checking the colon) in Black and underserved communities in Phoenix. It may help you find out which screening tests fit you and encourage regular screening.
Scottsdale, ArizonaAges 45 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+ - NCT05677269Recruiting
Compare surgery for bowel endometriosis versus IVF pathway
This trial studies whether surgically removing colorectal (bowel) endometriosis works better and is more cost-effective than choosing an IVF/ICSI treatment plan. It’s for people who want to get pregnant and are deciding between surgery and fertility treatments.
EindhovenAges 21–40 - NCT05731726RecruitingPhase 2
New treatment before surgery for locally advanced rectal cancer
This trial tests whether giving serplulimab (an immune medicine) plus CAPEOX chemotherapy and celecoxib before surgery can shrink locally advanced rectal cancer and improve outcomes. It may help by increasing immune attack on the tumor while chemotherapy helps reduce the cancer before the operation.
Hangzhou, ZhejiangAges 18–75 - NCT05732389RecruitingPhase 2
Immunotherapy for early rectal cancer with dMMR or MSI
This trial studies whether immunotherapy (nivolumab plus ipilimumab) can help people with early-stage rectal cancer that has dMMR or MSI changes. It’s meant for patients who have not yet had chemotherapy, radiation, or immunotherapy for colorectal cancer.
AalborgAges 18 years+ - NCT05752136RecruitingPhase 3
Pre-surgery radiation plus immunotherapy and chemo for rectal cancer
This trial tests whether a short course of radiation before surgery, combined with the immunotherapy drug envafolimab and the chemo regimen CAPEOX, works better for shrinking locally advanced rectal cancer. It is aimed at people whose tumor is not “MMR-deficient” (it is pMMR/MSS), and it asks participants to be able to return for repeated checkups and treatments.
Hangzhou, ZhejiangAges 18 years+ - NCT05772481Recruiting
PET-MRI scan test for rectal cancer after pre-surgery treatment
This study looks at whether a special scan called PET-MRI can better show how rectal cancer responds to treatment given before surgery. If it works well, it could help doctors plan the right next steps after chemoradiotherapy.
StrasbourgAges 18–75 - NCT05793554Recruiting
AI checks cancer type during rectal surgery in real time
This study tests an AI system that helps identify cancer or polyp findings during rectal surgery or assessment, using real-time information. It may help surgeons classify tissue more accurately while you are already getting treatment.
Dublin, IrelandAges 18 years+ - 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 - 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 - 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 - NCT05933122Recruiting
Sexual health support after rectal cancer surgery
This study looks at how common sexual difficulties are in women after rectal cancer surgery, and whether a sexologist-led support program can help. If you qualify, you may be asked about sexual well-being and take part in counseling support.
Brive-la-GaillardeAges 18 years+ - NCT05938322Recruiting
Ketogenic diet during pelvic cancer radiation treatment
This trial studies whether a very low-carbohydrate (ketogenic) diet can be followed safely while you receive neoadjuvant radiation for locally advanced rectal cancer. It may help researchers understand effects related to nutrition and treatment tolerance during radiation.
RomeAges 18–75 - NCT05939687RecruitingPhase 3
Mesh placement to help prevent complications after bowel surgery
This Phase 3 trial tests whether placing a protective mesh during stoma closure can lower the risk of complications after low anterior resection surgery. It may help people heal more safely and reduce stoma-related problems.
MoscowAges 18–85
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Common questions
- Are there clinical trials for colorectal (colon or rectal) cancer?
- Yes. Clin2 currently lists 900 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.