Blood Tests Tracking Tumor DNA During Treatment for Rectal Cancer
Studies blood DNA from tumors in adults with rectal cancer during total neoadjuvant therapy.
Plain-language title generated from the registry record
Registry title: ctDNA Monitoring to Predict the Efficacy of TNT for Rectal Cancer
Key facts
- Where
- Ho Chi Minh City, VietnamSee the site
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 80 years old?
Source: NCT06589388, who can take part
Where in Vietnam
- Medical Genetics InstituteHo Chi Minh City, VietnamTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Gene Solutions
- Trial code
- NCT06589388
- Record updated
- 19 September 2024
- Original description
This is a prospective observational study with three primary objectives:Read full original descriptionShow less
ctDNA Monitoring to Predict the Efficacy of Total Neoadjuvant Therapy for Rectal Cancer
This is a prospective observational study with three primary objectives:
Objective 1: Evaluate the detection rate and changes in circulating tumor DNA (ctDNA) levels in blood samples from colorectal cancer patients before, during, and after total neoadjuvant therapy (TNT).
Determine the detection rate and change of CtDNA in blood samples of cancer patients before, during, and after TNT then assess changes in ctDNA expression within the study population during treatment.
* Determine the ctDNA positivity rate before treatment. * Determine the ctDNA positivity rate during TNT. * Determine the ctDNA positivity rate after TNT and assess ctDNA level changes during treatment.
Objective 2: Investigate the relationship between ctDNA expression and MRI/CT scan imaging with the pathological complete response (pCR) to neoadjuvant therapy :
* Correlation between ctDNA detection and pCR/TRG/NAR score. Calculate the Positive Prediction Value - PPV, Negative Prediction Value - NPV of ctDNA, * Correlation between MRI/CT scan imaging and pCR. Calculate the PPV and NPV of MRI/CT scan * Combination of ctDNA detection and MRI/CT scan imaging to predict pCR. Calculate the PPV and NPV of the combined markers.
Objective 3: Evaluate the relationship between post-TNT ctDNA expression and disease-free survival in colorectal cancer patients.
Inclusion: 18 years and older, both genders; Patients are diagnosed with stage II-III rectal cancer and indicated for total neoadjuvant therapy; Biopsy FFPE sample is available at the time of diagnosis; Patients consented to participate in the study.
Exclusion: Patients are indicated for chemoradiation therapy only; Stage I rectal cancer, recurrent or metastatic cancer; Other cancer metastasis to the rectum; Have been or are being treated for cancer; Patients do not agree to participate in the studies.