The purposes of this study are to collect and store samples including blood, normal and tumor tissue from patients with colorectal cancer or gastric cancer, to collect and store samples including blood and/or normal gastrointestinal tissue (if available) from patients with non-malignant disease (including, but not limited to, inflammatory bowel disease (IBD), gastric ulcer, hemorrhoids or hernia), and to create a database for the collected samples and allow access to relevant clinical information for current and future protocols.

Inclusion Criteria:

• Any patient diagnosed with colorectal cancer, gastric cancer, non-malignant disease that requires undergoing surgery.
• Must be willing and able to provide informed consent.

Exclusion Criteria:

• Subjects whose comorbidities would preclude diagnostic or therapeutic intervention.

Participants who are planning to undergo surgery.