CEA Test — Colorectal Cancer Marker

Introduction

CEA (Carcinoembryonic Antigen) is one of the earliest discovered tumor markers, commonly elevated in colorectal cancer and other digestive cancers. It serves as a supportive tool for risk assessment, treatment monitoring, and recurrence surveillance.

Note: High CEA does not always indicate cancer. Smokers and patients with benign diseases (e.g., inflammatory bowel disease, pancreatitis, liver disease) may also show elevated levels.

Why Take a CEA Test?

• Risk assessment: Provides supporting evidence when colorectal cancer is suspected.
• Treatment monitoring: Tracks CEA changes before, during, and after therapy.
• Recurrence follow-up: Used for post-surgery or post-treatment surveillance.

Method & Workflow

A venous blood sample is collected to measure serum CEA. Results must be interpreted with colonoscopy, imaging, and clinical evaluation.

Factors & Notes

• Smokers may naturally have higher CEA levels.
• Benign conditions (IBD, pancreatitis, hepatitis) can also elevate CEA.
• Serial trends are more valuable than a single measurement.

Who Should Consider Testing?

• Patients clinically suspected of colorectal cancer
• Confirmed cases under treatment monitoring
• Post-surgery or post-treatment patients for recurrence follow-up
• Individuals undergoing a digestive tumor marker panel

Frequently Asked Questions (FAQ)