Medical Oncologist
CION Cancer Clinics
Ultrasound plus AFP: why liver surveillance uses both | CION Cancer Clinics
Doctors pair the six-monthly liver ultrasound with an AFP blood test because each one misses cancers the other can catch. The scan looks for a spot; AFP looks for a protein some liver cancers release. This page explains what each test can and cannot show, what happens when a result changes, and who does not need this pair at all. At CION Cancer Clinics, our specialists help you understand your own risk and plan regular liver checks that fit it.
NG
Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed October 2026, next review due October 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
The short answer
Why do doctors check AFP as well as the ultrasound?
Because each test misses some cancers the other catches. The ultrasound looks for a spot in the liver. The AFP blood test looks for a protein that some liver cancers release. Used together every six months, they find more early, treatable liver cancers than the scan alone.
Who this page is about
This page is about surveillance for primary liver cancer (hepatocellular carcinoma, or HCC), the kind that starts in the liver. It is for people with cirrhosis, meaning a liver scarred by long-term damage, and for some people with hepatitis B. If you have been told cancer has spread to your liver from another organ, AFP is usually not the test that matters for you, and your oncologist will explain which one is.
What AFP actually is
AFP stands for alpha-fetoprotein. It is a protein made in large amounts by a baby before birth and in small amounts in adults. Some liver cancers make it again. A raised level is a reason to look harder. It is never a diagnosis on its own. For the basics, read what AFP is and what it measures.
Neither test alone, and not even both together, can promise that nothing has been missed. They lower the chance.Why one test is not enough
What can each test miss on its own?
Each test has blind spots. Pairing them covers some of those gaps, which is why many liver guidelines suggest both.
Where ultrasound struggles
A very scarred, lumpy liver can hide a small tumour among the nodules. Body fat and bowel gas can blur the picture. Some parts of the liver, high under the ribs, are hard to see.
Often reported as
- Limited study
- Poor visualisation
- Coarse, nodular liver
Where AFP struggles
Many liver cancers, especially small ones, do not raise AFP at all. A normal AFP therefore cannot rule cancer out.
This is why AFP is never used alone for surveillance.Where AFP misleads
AFP can rise without any cancer, for example during a flare of hepatitis B or C, when the liver is inflamed, or in pregnancy. A single raised value often settles back down.
What the pair adds
A rising AFP can prompt a closer look when the scan was unclear. A spot on the scan is checked further whatever the AFP says. Each one acts as a second pair of eyes for the other.
Not sure whether this applies to you?
Ask an oncologistSide by side
How do the ultrasound and AFP compare?
Ultrasound
AFP blood test
Looks at the shape and texture of the liver
Measures a protein in the blood
Can show where a spot is and roughly how big
Cannot show where anything is
Depends on the person doing the scan and the view
Depends on the lab and on liver inflammation
No needle, no radiation, but needs a trained sonologist
A simple blood sample that any good laboratory can run
Most useful as a single result
Most useful as a trend across several tests
After the results
What happens when the results come back?
Both normal
Carry on with the next pair in six months. Book it before you forget, and keep the reports together in one folder, in date order, so any doctor can compare them quickly.
A spot on the scan
Your doctor usually asks for a triple-phase CT or MRI, a scan taken at several moments after a dye injection, to see how the spot behaves. Read why a triple-phase scan comes next.
AFP higher than before
The doctor compares it with your earlier values and checks whether your hepatitis is active. A clear rise, even with a normal scan, usually leads to a CT or MRI.
The tumour board looks at it
If the further scan is worrying, the CION tumour board reviews the images and blood results together and explains the next step to you.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
Commonly believed
What do people misunderstand about AFP?
"My AFP is normal, so I do not have liver cancer."
Many liver cancers never raise AFP, particularly when they are small. A normal AFP is reassuring only alongside a clear scan.
"My AFP is high, so it must be cancer."
Hepatitis flares, liver inflammation and pregnancy can all raise it. A high value means more tests, not a diagnosis. See my AFP is high: do I have cancer?
"The blood test is enough. I can skip the scan."
AFP alone misses too many cancers to be relied on. The scan is the main test. The blood test supports it.
"Only the latest number matters."
The direction over time tells your doctor more than any one reading. Keep every report, from every lab, so the trend can be seen.
Being straight with you
What this page cannot tell you
It cannot tell you what your own AFP value means, or whether a spot on your scan is cancer. Normal ranges differ between laboratories, and the same number can mean different things in an inflamed liver and a quiet one. The doctor following you reads it against your history.
Who this does not apply to
People with fatty liver and no scarring usually do not need either test on a six-monthly plan. AFP is not a general cancer screening test for healthy people, and checking it "just in case" often causes needless worry. Children with liver tumours are looked after differently; see hepatoblastoma in children.
Where the evidence is still moving
Newer blood markers and score-based tests are being studied, and some centres add them. They are not yet a standard replacement for the ultrasound and AFP pair. Your doctor can tell you whether they would change anything for you.
CION arranges the scan and blood test through accredited diagnostic partners, and its oncologists go through both results with you.Questions we are asked
Common questions about ultrasound and AFP
Should the AFP be done on the same day as the scan?
It is convenient to do both together, so your doctor sees the pair at one visit. It is not essential that they fall on exactly the same day. What matters is that both happen every six months and that neither is quietly dropped.
Do I need to fast for the AFP test?
AFP itself does not usually need fasting. The ultrasound often does, so if you are having both on one morning, follow the scan centre's instructions. Ask when you book, because practice varies between centres.
My AFP went up slightly. Should I worry?
A small change on its own is common and often settles. Your doctor looks at the direction over several tests and at whether your hepatitis is active. If the rise is clear or keeps going, a CT or MRI is usually arranged even if the ultrasound looks normal.
Can I get the AFP done at a local lab?
Yes, but try to use the same lab each time. Different labs can give slightly different numbers for the same blood, which makes trends harder to read. If you change labs, tell your doctor so the comparison allows for it.
Is AFP useful after liver cancer treatment?
If your cancer raised AFP before treatment, it is often used to follow how well treatment worked and to watch for return. That is a different use from surveillance. Read AFP after treatment.
Does hepatitis B treatment affect the AFP?
Active hepatitis can push AFP up, and control of the virus with antiviral tablets often lets it settle. Hepatitis B is controlled, not removed, so surveillance continues. Your hepatologist or physician manages the antivirals; your oncologist reads the surveillance results.
Can the scan and blood test be done less often if both stay normal?
For most people with cirrhosis, no. The risk comes from the liver itself and stays even after years of normal results. Talk to your doctor before changing the schedule rather than stretching it on your own.
Who should I take the results to?
The doctor who is following your liver, whether a hepatologist, a physician or an oncologist. If you are not sure who that is, call the CION helpline and someone will help you find the right clinic for a review.
Your Specialists
Meet CION's liver cancer specialists. Bring your scan reports and liver blood tests.
Our medical and surgical oncologists plan liver cancer care together, weighing the tumour and how well your liver works before choosing surgery, a liver-directed procedure or medicines.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Sources
- American Cancer Society — Can Liver Cancer Be Found Early?
- American Cancer Society — Diagnosing Liver Cancer
- AASLD — Practice Guidelines
- Cancer Research UK — Diagnosing liver cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Talk to us
Have a scan or AFP result you are unsure about?
Send us your latest ultrasound and AFP reports, along with earlier ones if you have them. An oncologist can go through them with you and explain whether anything further is needed. One helpline serves every CION centre.