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Reading your HPLC or haemoglobin electrophoresis report | CION Cancer Clinics
An HPLC or haemoglobin electrophoresis report shows which types of haemoglobin your blood makes and how much of each. The key line is usually HbA2: a value above about 3.5% suggests beta thalassaemia trait. Extra types such as HbS or HbE point to sickle cell or HbE trait. A normal report does not rule out alpha trait, and low iron or a recent transfusion can change the result. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- What does an HPLC or electrophoresis report actually show?
- In what order should you read the report?
- What do the terms on an HPLC report mean?
- Which report patterns come up most often?
- What do people often misread on an HPLC report?
- What can the report not tell you on its own?
- Common questions about HPLC and electrophoresis reports
The short answer
What does an HPLC or electrophoresis report actually show?
It shows which types of haemoglobin are in your blood, and how much of each. A normal adult pattern is mostly HbA, a small amount of HbA2 and a trace of HbF. Changes in those amounts, or an extra type such as HbS or HbE, point to a carrier state or a haemoglobin disorder.
Two names, one question
HPLC stands for high performance liquid chromatography. Haemoglobin electrophoresis is an older method that separates the same types in a different way. Most laboratories in Hyderabad now use HPLC, and some confirm an unusual result by electrophoresis. Both answer the same question: which haemoglobins do you make?
Why it is usually asked for
The commonest reason is a blood count showing small, pale red cells that iron does not explain. It is also done before marriage, in early pregnancy, when a relative has thalassaemia or sickle cell disease, and when a newborn or child has a low haemoglobin that needs a cause.
HPLC is a screening and diagnostic test for haemoglobin disorders. It says nothing about leukaemia or any other blood cancer.Reading the report
In what order should you read the report?
Check the blood count beside it
Most HPLC reports print the haemoglobin, MCV and MCH alongside. Small red cells make a carrier state more likely. The HPLC result is always read with these, never on its own.
Find the HbA2 line
This is the line that matters most for beta thalassaemia trait. The laboratory prints its own normal range next to it. A value above about 3.5% usually suggests beta trait.
Look at HbF
Foetal haemoglobin, the type made before birth. Adults make very little. A raised HbF appears in some carriers, in thalassaemia major and in a few other conditions.
Look for an extra peak or window
Any variant such as HbS, HbE or HbD is named here, with its amount. Then read the interpretation line at the bottom, which is the laboratory's own summary.
Not sure whether this applies to you?
Ask an oncologistOn your report
What do the terms on an HPLC report mean?
- HbA (HbA0)
- Normal adult haemoglobin. It makes up most of the total in a healthy adult.
- HbA2
- A minor adult haemoglobin. Raised in beta thalassaemia trait. It can read falsely low when iron is very low.
- HbF
- Foetal haemoglobin. High at birth, then falls over the first months of life. Raised levels in adults need interpreting.
- HbS
- Sickle haemoglobin. Some alongside HbA suggests sickle cell trait. Mostly HbS with no HbA suggests sickle cell disease.
- HbE and HbD Punjab
- Haemoglobin variants seen in India. Carrying one alone is usually harmless, but it matters when a partner carries beta trait.
- Retention time and window
- Where on the machine's timeline a haemoglobin appeared. It helps the laboratory name the type. You do not need to read it.
- Suggested correlation or DNA analysis
- The laboratory is saying the pattern alone cannot settle the answer, and a further test or a doctor's review is needed.
Patterns you may see
Which report patterns come up most often?
These are typical patterns only. Your laboratory's own range and your haematologist's reading decide what your report means.
Normal pattern
HbA2 and HbF within the laboratory range and no variant. Beta trait, sickle trait and HbE trait are then unlikely.
Alpha trait can still be present with a normal report.Beta thalassaemia trait
HbA2 raised, sometimes with a slightly raised HbF, and small red cells on the count. You are a carrier. You need no treatment, but your partner should be tested before pregnancy.
A variant trait
A named extra type, such as HbS, HbE or HbD, alongside a larger share of normal HbA. This is usually a carrier state.
Matters most when
- Your partner has beta trait
- Your partner carries the same variant
Mostly HbF, little or no HbA
Seen in thalassaemia major in young children, often before a first transfusion. This needs a haematologist promptly, not a repeat test at home.
Borderline HbA2
A value close to the cut-off. It may be a mild beta trait, low iron masking a trait, or nothing. It usually needs iron studies, family testing or DNA analysis.
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Commonly believed
What do people often misread on an HPLC report?
"A normal HPLC means I cannot be a thalassaemia carrier."
It makes beta trait unlikely. It does not rule out alpha trait, which usually shows only on DNA testing. If both partners have small red cells with normal iron and a normal HPLC, ask whether alpha testing is needed.
"The report says trait, so I have thalassaemia and need treatment."
Trait means you carry one changed gene. It is not the disease, and it does not turn into it. Most carriers need no treatment and no iron unless tests show low iron as well.
"The HbA2 was only slightly above range, so we can ignore it."
A small rise can still mean trait. Before marriage or pregnancy that matters. Ask a haematologist to read it with your iron results and, where useful, with your parents' reports.
"We can test my child straight after a blood transfusion."
Transfused blood carries the donor's haemoglobin and can make the report look near normal. Tell the laboratory about any recent transfusion. Your haematologist may test before the first transfusion, test the parents instead, or use DNA testing.
Being straight with you
What can the report not tell you on its own?
An HPLC report cannot always give a final diagnosis. Reference ranges differ between laboratories and machines, and a single result is read alongside your blood count, your iron levels, your symptoms and often a repeat test. The interpretation line is a suggestion, not a verdict.
When the result can be misleading
Very low iron can pull HbA2 down and hide a beta trait. A recent transfusion adds donor haemoglobin. In babies, HbF is naturally high, so results are read against age. Some rare variants sit in the same window as common ones and need confirming by another method.
What to do with a result that says trait or variant
Keep a copy safely, because you will need it again. Ask your partner to be tested before pregnancy, or as early in pregnancy as possible. If both of you are carriers, a haematologist or genetic counsellor can explain the chance for each pregnancy and the testing that can be offered.
Who needs more than a report reading
A child with a very low haemoglobin, a swollen tummy or poor growth, or an adult who needs regular transfusions, needs a full haematology review, not just an explanation of the numbers.
Did you know
Testing both partners before marriage is the simplest way to know whether a child could be born with thalassaemia major. It needs one blood sample from each of you, and the result does not change over your lifetime.
Questions we are asked
Common questions about HPLC and electrophoresis reports
Do I need to fast before an HPLC test?
No. It is an ordinary blood sample and you can eat and drink as usual. Tell the laboratory if you have had a blood transfusion recently, if you are pregnant, and if you are taking iron. Bring your latest blood count report, because the two are read together.
Is HPLC the same as haemoglobin electrophoresis?
They answer the same question using different methods. HPLC is faster, measures HbA2 more precisely and is the usual first test in most laboratories. Electrophoresis is sometimes used to confirm an unusual variant. Your doctor may ask for one or both, depending on what the first result shows.
My HbA2 is raised. Do I need iron tablets?
A raised HbA2 on its own is not a reason for iron. It usually means beta thalassaemia trait, where iron does not help. Your doctor will check your ferritin. Iron is only given if that shows you are short of iron, and then only as your doctor advises. Do not start it on your own.
Can the report be wrong?
The machine measurement is generally reliable, but the reading can mislead. Low iron, a recent transfusion, a young baby's age and rare variants can all change what the numbers seem to say. That is why a borderline or unusual result is often repeated, compared with family results or confirmed by DNA testing.
How early can a baby be tested?
A newborn can be tested, but because HbF is so high at birth, results are read against age and may need repeating later in infancy. If both parents are known carriers, tell your paediatrician early. Testing can also be offered during pregnancy, which is a conversation to have with your obstetrician and haematologist.
Both my husband and I are carriers. What now?
Please do not panic, and do not make decisions from the report alone. Ask for a haematology or genetic counselling appointment together. They will confirm exactly which carrier states you each have, explain the chance for each pregnancy, and describe the tests that can check a pregnancy early.
Will HPLC show alpha thalassaemia trait?
Usually not. Alpha trait often gives a normal or slightly low HbA2, so the report can look normal. It is suspected when red cells are small, iron is normal and HPLC is normal. Confirming it needs DNA testing, which your haematologist can arrange through a qualified laboratory when it will change a decision.
Does an abnormal HPLC mean cancer?
No. HPLC looks at inherited types of haemoglobin. Carrier states and thalassaemia are not cancers. If your blood count also showed very abnormal white cells or platelets, that is a separate question for your doctor, and HPLC is not the test that answers it.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Sources
- NHS Sickle Cell and Thalassaemia Screening Programme — Sickle cell and thalassaemia screening: handbook for laboratories
- NHS — Thalassaemia
- National Heart, Lung, and Blood Institute — Thalassemias
- American Society of Hematology — Thalassemia
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
Thalassaemia Trait or Iron Deficiency: Telling Them ApartWhen small red cells could be low iron insteadBeta vs Alpha ThalassaemiaWhy a normal HPLC can miss alpha traitMarriage and Carrier Testing in ThalassaemiaWhat to do when both partners are carriersThalassaemiaThe full guide to thalassaemia types and care
Talk to us
Have an HPLC report you cannot make sense of?
Share it with us along with your blood count. CION's haematology team will read it with you and explain what, if anything, needs to happen next.