Clinical Research Directory

Oxaliplatin, Leucovorin, and Fluorouracil With or Without Bevacizumab in Treating Patients Who Have Undergone Surgery for Stage II Colon Cancer

This randomized phase III trial studies oxaliplatin, leucovorin, fluorouracil, and bevacizumab to see how well they work compared to oxaliplatin, leucovorin, and fluorouracil in treating patients who have undergone surgery for stage II colon cancer. Drugs used in chemotherapy, such as oxaliplatin, leucovorin, and fluorouracil, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Monoclonal antibodies, such as bevacizumab, may interfere with the ability of tumor cells to grow and spread. It is not yet known whether giving combination chemotherapy together with bevacizumab is more effective than combination chemotherapy alone in treating colon cancer.

A Clinical Study of Calderasib (MK-1084) With Targeted Therapy and Chemotherapy in People With Colorectal Cancer (MK-1084-012/KANDLELIT-012)

Researchers are looking for other ways to treat locally advanced or metastatic colorectal cancer (mCRC) that is unresectable and has a gene mutation called KRAS G12C. Standard (or usual) treatments for this type of colorectal cancer may include mFOLFOX6 with or without bevacizumab. Researchers want to learn if adding calderasib (the study medicine) and cetuximab to mFOLFOX6 can treat locally advanced or mCRC with the KRAS G12C mutation. Calderasib and cetuximab are targeted therapies. The goals of this study are to learn: * About the safety of calderasib with cetuximab and mFOLFOX6 and if people tolerate the treatments * If people who receive calderasib with cetuximab and mFOLFOX6 live longer without mCRC growing or spreading compared to people who receive mFOLFOX6 with or without bevacizumab.

Study of Cabozantinib and Nivolumab in Refractory Metastatic Microsatellite Stable (MSS) Colorectal Cancer

Data from a prior phase II study of single agent cabozantinib in metastatic, refractory colorectal cancer (NCT03542877) combined with the compelling preclinical data in colorectal mouse models utilizing cabozantinib combined with nivolumab have led to this concept for a clinical trial to combine cabozantinib and nivolumab in patients with metastatic MSS CRC in the third line setting and beyond.

Tolecizumab Plus Chemoimmunotherapy for pMMR/MSS Locally Advanced Colon Adenocarcinoma

This multicenter, randomized, open-label, blinded-endpoint Phase II trial assesses the efficacy and safety of tolecizumab (PCSK9 inhibitor) plus sintilimab/CapeOX chemoimmunotherapy as neoadjuvant treatment for pMMR/MSS locally advanced colon adenocarcinoma (cT3c+). 106 patients are 1:1 randomized to the combination or chemoimmunotherapy alone, with pCR as the primary endpoint.

Combination Chemotherapy With or Without Atezolizumab in Treating Patients With Stage III Colon Cancer and Deficient DNA Mismatch Repair

This phase III trial studies combination chemotherapy and atezolizumab to see how well it works compared with combination chemotherapy alone in treating patients with stage III colon cancer and deficient deoxyribonucleic acid (DNA) mismatch repair. Drugs used in combination chemotherapy, such as oxaliplatin, leucovorin calcium, and fluorouracil, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Immunotherapy with monoclonal antibodies, such as atezolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving combination chemotherapy with atezolizumab may work better than combination chemotherapy alone in treating patients with colon cancer.

COLON ERDERLY LOW DOSE

In this retrospective observational study, the case series of patients undergoing first-line treatment for metastatic colorectal adenocarcinoma with doublet fixed-dose and reduced-dose chemotherapy in combination with full-dose monoclonal antibody in patients aged 70 years or older is collected.

Testing the Use of BRAF-Targeted Therapy After Surgery and Usual Chemotherapy for BRAF-Mutated Colon Cancer

This phase II/III trial compares treatment with encorafenib and cetuximab to usual care (patient observation) for reducing the chance of cancer recurrence after standard surgery and chemotherapy in patients with BRAF-mutated stage IIB-III colon cancer. Encorafenib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Cetuximab is in a class of medications called monoclonal antibodies. It binds to a protein called EGFR, which is found on some types of tumor cells. This may help keep tumor cells from growing. Giving encorafenib and cetuximab after standard surgery and chemotherapy may be more effective at reducing the chance of cancer recurrence compared to the usual patient observation.

Comparison of Laparoscopic and Open Total Mesocolic Excision With Central Vascular Ligation for Right Colon Carcinoma

The goal of this observational comparative study is to assess whether laparoscopic complete mesocolic excision with central vascular ligation (L-CME with CVL) provides improved short-term surgical outcomes compared with open complete mesocolic excision with central vascular ligation (O-CME with CVL) in patients with right-sided colon cancer. The primary questions this study aims to answer are: Does laparoscopic CME with CVL reduce blood loss, postoperative complications, and length of hospital stay compared with open CME? Does laparoscopic CME with CVL achieve equivalent surgical specimen quality and short-term oncological outcomes compared to the open approach? Researchers compared laparoscopic versus open right hemicolectomy with CME and CVL in adult patients diagnosed with right colon cancer who were eligible for elective surgical resection. Participants underwent standard preoperative assessment, including clinical evaluation, laboratory testing, imaging studies, colonoscopy, and biopsy confirmation. Surgical treatment consisted of either laparoscopic or open complete mesocolic excision with central vascular ligation, performed according to standardized oncologic surgical principles. Postoperative care followed an enhanced recovery protocol. Primary outcome measures included operative time, intraoperative blood loss, time to first flatus, postoperative complications, and duration of hospital stay. Secondary outcomes included quality of the surgical specimen (lymph node yield, mesocolic integrity, and margin status) and short-term oncologic outcomes, including early recurrence during follow-up.

Sentinel Node and Organ-sparing Surgery in Stage I Colon Carcinoma

The aim of this study is to reduce the need for colectomy and its' associated morbidity and mortality in patients with pT1-2 colon carcinoma after endoscopic resection and an estimated lymph node metastasis (LNM) risk of \>15%, or with macroscopically suspected T1 tumors, by performing an endoscopic-assisted laparoscopic/robotic wedge resection of the tumor or scar, along with sentinel node (SLN) biopsy using indocyanine green (ICG). This intervention will be compared to the standard-of-care segmental resection using a partially randomized patient preference design. The primary outcome is the 3-year recurrence rate.

Young-Onset Colorectal Cancer

This study investigates the genetic factors that may influence the risk of developing colorectal cancer at a young age. Finding genetic markers for colorectal may help identify patients who are at risk of colorectal cancer. Studying individuals and families at high risk of cancer may help identify cancer genes and other persons at risk.

LDLT in Non Resectable Colo-rectal Cancer Liver Metastasis

This study is an interventional open label prospective study that aims to assess both overall and disease-free survival of patients treated with LDLT, partial or whole graft LT from deceased donors for unresectable CRLM. Secondary outcomes are graft survival and donor outcomes in terms of safety and quality of life. Donor selection is performed according to the currently used Institutional and National standards and protocols.

Family Communications After Genetic Testing

This clinical trial compares patient (proband)-mediated communication to provider-mediated communication for improving genetic testing in first-degree relatives of patients with newly diagnosed colorectal cancer. It is estimated that 30% of cases of colorectal cancer have a genetic basis and about 15% of these patients have a disease-causing (pathogenic) inherited (germline) variant in a cancer susceptibility gene. Most individuals carrying a pathogenic germline variant are unaware of their cancer risk and may not meet guidelines for genetic testing. Identifying pathogenic germline variants or hereditary cancer syndromes in cancer patients has important implications for their at-risk relatives who may not know that they are at high risk for cancer. The burden of communicating this risk to first-degree relatives often falls on the patients, who may lack sufficient knowledge to correctly share and explain their genetic test results. Receiving provider-mediated communication of genetic testing results may be more effective at communicating genetic risk to first-degree relatives than the usual practice of proband-mediated communication.

Pilot Study for Colorectal Cancer and Advanced Adenoma Detection With the Mainz Biomed Colorectal Cancer Test

The Mainz Biomed Colorectal Cancer Screening Test is being studied for its performance in the identification of the presence of colorectal cancer (CRC) or advanced adenoma (AA) in the colon in patients at average risk for colorectal cancer.

Evaluating Novel Therapies in ctDNA Positive GI Cancers

This study is a non-randomized, open-label, multi-cohort, multi-site, pilot feasibility therapeutic trial. The study will enroll 20 patients across 4 cohorts (CRC, gastric, PDAC, and HCC/intra-hepatic-/extra-hepatic-, gall bladder adenocarcinomas) diagnosed with histologically confirmed GI cancers. These patients will have already completed all Standard of Care (SOC) treatments (including neoadjuvant, surgery, local therapies, and/or adjuvant therapy as applicable), as defined by the treating primary physician or research team, with curative intent but have a positive SignateraTM tumor-informed ctDNA test and NED radiographically by standard imaging within 28 days prior to enrollment and within 1 year of completing all curative-intent therapy. All patients will be treated with intravenous (IV) atezolizumab 1200 mg IV and bevacizumab 15 mg/kg on Day 1 of 21-day cycles until disease recurrence, ctDNA POD, unacceptable toxicity, or subject withdrawal of consent with a maximum 12 month total duration of study therapy. Atezolizumab and bevacizumab drug will be provided.

Current Microsatellite Stability Results in Colon Cancer

The goal of this prospective observational study is to learn more about how a specific type of DNA repair issue-called mismatch repair deficiency (dMMR)-affects colon cancer in people living in Turkey. The study will look at how often dMMR occurs, how it is reported, and how it relates to treatment outcomes. The main questions it aims to answer are: * How common is dMMR in colon cancer, and does it vary by where the tumor is in the colon? * How often is MSI (microsatellite instability) status reported in colon cancer biopsy reports before surgery? * How do different types of dMMR (such as MLH1/PMS2 loss, MSH2/MSH6 loss, or sporadic cases) affect survival over three years? Participants will: * Be people who had surgery for colon cancer between June 1, 2025 and May 31, 2026 at hospitals in Turkey that treat more than 30 colon cancer cases each year. * Have their medical and pathology data reviewed, including information about tumor location, biopsy results, surgery, and treatment. This study will not involve any new treatments. Instead, it will use existing medical records to better understand how to improve care and identify people who may benefit from immunotherapy. Results from this study will be shared at scientific meetings and published in medical journals.

Circulating Tumor DNA Testing in Predicting Treatment for Patients With Stage IIA Colon Cancer After Surgery

This phase II/III trial studies how well circulating tumor deoxyribonucleic acid (ctDNA) testing in the blood works in predicting treatment for patients with stage IIA colon cancer after surgery. ctDNA are circulating tumor cells that are shed by tumors into the blood. Finding ctDNA in the blood means that there is very likely some small amounts of cancer that remain after surgery. However, this cancer, if detected, cannot be found on other tests usually used to find cancer, as it is too small. Testing for ctDNA levels may help identify patients with colon cancer after surgery who do benefit, and those who do not benefit, from receiving chemotherapy.

Study of ctDNA Guided Change in Tx for Refractory Minimal Residual Disease in Colon Adenocarcinomas

This is a phase 1b, prospective, single arm, non-randomized, open-label clinical trial determining the efficacy of adjuvant trifluridine and tipiracil (TAS-102) in combination with irinotecan in patients with ctDNA positive colon adenocarcinoma.

Evaluation of PreveCol's Efficiency As a Second Line Method for the Early Colorectal Cancer Detection

The objective of this low-risk interventional study is to evaluate whether the PreveCol® test has sufficient efficiency to be considered as a second-line method for the detection of both colorectal cancer and advanced adenomas when used prospectively in the screening population with a previous positive FOBT result, which could include any of the following: both sexes, age 50-69 years, asympthomatic volunteers. The main aims to be answered are: * Values of efficacy, efficiency, impact and safety of PreveCol. * Values of preferences of participants for screening methods. * Values of PREMs into screening programme. Participants will provide a blood sample prior to a screening colonoscopy, and complete two questionnaires. They will give their sample, information and clinical data to the investigator or health care personnel.

Encorafenib + Cetuximab Beyond Progression in Combination With FOLFIRI in Patients With BRAF V600E Mutated Metastatic Colorectal Cancer Progressing on Encorafenib + Cetuximab.

The aim of this study is to determine the activity of encorafenib plus cetuximab in combination with FOLFIRI in patients with BRAF V600E mutated metastatic colorectal cancer progressing on encorafenib plus cetuximab administered in second line.

HDAC Inhibitor Combination With Chemoimmunotherapy in the Neoadjuvant Treatment of pMMR Locally Advanced Colon Cancer

The purpose of this clinical trial is to learn the safety and efficacy of HDAC inhibitors in combination with neoadjuvant immunochemotherapy compared to neoadjuvant therapy in the treatment of locally advanced colon cancer. The main questions it aims to answer are: Can HDAC inhibitors combined with neoadjuvant immunochemotherapy improve the rate of pCR and complete resection in patients? Are HDAC inhibitors combined with neoadjuvant immunochemotherapy safe and reliable? Does the combination of HDAC inhibitors and neoadjuvant immunochemotherapy achieve a better long-term prognosis than neoadjuvant therapy?

Inhalational or Intravenous Anesthesia During Surgery for Patients With Colon Cancer, VIVA Study

This trial evaluates how inhalational anesthesia (drawn in through the lungs) and total intravenous anesthesia (TIVA) (through a needle in a vein in the arm) change the body's ability to recover from surgery or whether they impact the immune system immediately after surgery in patients with colon cancer. It is unknown whether these types of anesthesia change recovery from surgery or change the chances cancer comes back following surgery. This study may help researchers learn how different types of anesthesia affect recovery from colon cancer surgery.