Study Overview: This study looks at using a special blood test called **ctDNA** (circulating tumor DNA) to help manage patients with tumors in the **gastrointestinal tract** (parts of the body like the stomach and intestines). The study collects samples like blood and stool to find helpful clues (biomarkers) for better diagnosis and treatment.
Key Points:
- This study does not test new drugs, so there's no risk from experimental medications.
- It requires regular blood and stool samples at specific times.
- Participants won't receive direct medical treatment from the study.
To join, you need to be over 18, have a confirmed diagnosis of gastrointestinal cancer, and good overall health. You'll also need to provide a sample of your tumor tissue. If you don't have a confirmed diagnosis or don't give consent, you can't participate. The study is not funded by drug companies, ensuring unbiased results.
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