11/21/2025
Cancer leaves clues — and biomarkers help us find them early.
Cancer biomarkers are special substances that can be found in blood, urine, or tissues.
They act like warning signals, helping doctors to detect, monitor, and follow up certain cancers.
Biomarkers alone can’t confirm cancer, but they give important clues that guide further tests and treatment.
Common Cancer Biomarkers and Their Uses:
🔸 Thyroid: CEA, Thyroglobulin → used to check for recurrence after treatment.
🔸 Lung: CEA, CA-125, Cyfra 21-1 → help in detection and follow-up.
🔸 Breast (female): CEA, CA 15-3 → often used to monitor response to treatment.
🔸 Liver/Bile Duct: CEA, AFP, CA 19-9 → AFP is key for liver cancer, CA 19-9 for bile duct cancers.
🔸 Oesophagus: CEA, CSS → may help in detecting progression.
🔸 Stomach & Pancreas: CEA, CA 19-9, CA 72-4 → commonly checked in pancreatic and gastric cancers.
🔸 Colorectal: CEA, CA 19-9, M2-PK → especially useful in follow-up after treatment.
🔸 Ovaries (female): CA-125, CA 72-4 → CA-125 is one of the most widely used tumor markers in gynecology.
🔸 Uterus (female): CEA, CA-125, SCC → useful in tracking disease activity.
🔸 Prostate (male): PSA, FPSA & ratio → PSA is a key marker for early detection and monitoring.
🔸 Testicle (male): AFP, β-hCG → very important in diagnosis and monitoring.
🔸 Bone metastasis: CEA → may indicate cancer spread to bone.
Important Note:
•High biomarker levels don’t always mean cancer — they guide doctors to do more tests.
•These tests help with early detection and monitoring during treatment.
•Early action and regular checkups can save lives.
