CEA in Dehradun

What is a CEA?

Carcinoembryonic Antigen is a protein produced abundantly by the developing gut before birth, after which production largely stops. Some tumours switch it back on, which is what makes it measurable in certain cancers, most consistently those of the colon and rectum. Its role in practice is narrow and worth stating plainly, because tumour markers are widely misunderstood. CEA is a monitoring tool, not a screening test. It is not sensitive enough to find cancer in a healthy person, since many early cancers produce none at all, and it is not specific enough to confirm one, since smoking, chronic bronchitis, inflammatory bowel disease, pancreatitis, liver disease, peptic ulcer and even a benign colonic polyp can all raise it. Ordering it out of general anxiety therefore tends to produce either false reassurance or an alarming number with a harmless explanation, and neither helps. Where it genuinely earns its place is over time in someone already diagnosed: a falling CEA after surgery or chemotherapy indicates the treatment is working, and a level that begins climbing again can signal recurrence months before symptoms or scans do. The trend across serial readings carries the information, not any single value.

Why take this test?

A CEA test is advised by a specialist, and that qualification matters. Its established uses are establishing a baseline before treatment for a diagnosed colorectal cancer, confirming that the level falls after surgery, monitoring response during chemotherapy, and surveillance afterwards, where serial measurements are the earliest practical signal of recurrence. It is sometimes included in a wider work-up when a cancer is already suspected on imaging or endoscopy, to characterise it further. It is not a general health check, and it should not be added to a routine full-body panel for peace of mind. If you have symptoms that worry you, a change in bowel habit lasting weeks, blood in the stool, unexplained weight loss, or persistent abdominal pain, the right step is a doctor and usually a colonoscopy, not a tumour marker. Always interpret CEA with the doctor managing your care, never against the reference range alone.

• Baseline before treatment for a diagnosed colorectal cancer
• Confirming the level falls after surgery
• Monitoring response during chemotherapy
• Surveillance for recurrence after treatment
• Part of a specialist work-up where cancer is already suspected
• Not for screening healthy people or routine checkups

Normal reference ranges

Ranges are indicative for adults. Your report carries the lab-specific reference range and is reviewed by a LabONE pathologist; always interpret results with your doctor.

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