Blood and Tissue Sample Collection for Future Colon Cancer Biomarker Studies in Patients Undergoing Colonoscopy

Discovery of Candidate Biomarkers in Colon Cancer and Precancers Repository

RATIONALE: Collecting and storing samples of blood and tissue from patients undergoing colonoscopy to study in the laboratory may help doctors learn more about colon cancer and identify biomarkers related to colon cancer in the future.

PURPOSE: This laboratory study is collecting blood and tissue samples for future colon cancer biomarker studies in patients undergoing colonoscopy.

OBJECTIVES:

• Collect blood and tissue samples (including polyps, abnormal growths, cancer, and normal tissue) from patients undergoing colonoscopy.

OUTLINE: Patients undergo blood and tissue sample collection during colonoscopy. Samples are stored for future biomarker proteomic profiling.

DISEASE CHARACTERISTICS:

• Scheduled for colonoscopy as routine screening or for a specific problem

PATIENT CHARACTERISTICS:

• Not pregnant

PRIOR CONCURRENT THERAPY:

• No concurrent participation in a clinical trial to treat cancer or prevent cancer recurrence