Hematologist
CION Cancer Clinics
Iron overload from repeated transfusions, and how chelation helps | CION Cancer Clinics
Every unit of transfused blood adds iron that your body cannot get rid of. After many transfusions, that iron builds up in the liver, heart and glands, often without symptoms at first. Your team checks it with ferritin blood tests and sometimes an MRI. Chelation medicines can slowly remove it. This page explains how iron overload happens, how it is watched, and who chelation does and does not suit. At CION Cancer Clinics, every leukaemia, MDS and MPN case is reviewed by our haematologist and discussed at a tumour board before a plan is agreed.
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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
- Why do repeated transfusions cause iron overload?
- Where does the extra iron go, and what can it do?
- How will your team check your iron level?
- What do the words on your iron report mean?
- How does chelation remove iron, and who is it for?
- What do families often get wrong about iron overload?
- What is it like to take chelation for a long time?
- Common questions about iron overload and chelation
The short answer
Why do repeated transfusions cause iron overload?
Every bag of red cells you receive brings iron with it. Your body has no proper way to get rid of extra iron, so after many transfusions it slowly builds up in the liver, the heart and the glands.
How the build-up happens
Normally, the body holds on to iron very carefully. It takes in only what it needs from food and loses a small amount each day. A transfusion skips that control. The iron inside the donated red cells stays behind when those cells wear out. Over months and years of regular transfusions, the total climbs well above what the body can store safely.
Why it matters in MDS
Many people with lower-risk MDS live for years and need blood regularly for much of that time. That long stretch is exactly when extra iron has time to do harm. Too much iron can strain the heart, scar the liver and upset hormone glands such as the pancreas.
What this page cannot tell you
It cannot tell you whether your own iron level is a problem, or whether you need treatment for it. That depends on your reports, how many transfusions you have had, your risk group and your other health conditions. Your haematologist reads all of these together.
Never stop or delay a planned transfusion because you are worried about iron. Talk to your team first.Inside the body
Where does the extra iron go, and what can it do?
Iron settles in several organs. Early on, most people feel nothing at all, which is why it is checked with tests rather than symptoms.
The liver
The liver stores most of the extra iron first. Over time this can cause inflammation and scarring. Liver blood tests may start to rise before you notice any change.
The heart
Iron in the heart muscle is the most serious concern. It can weaken the pumping action or upset the heart rhythm.
Signs to mention to your team
- Breathlessness that is getting worse
- A racing or irregular heartbeat
- Swollen ankles
Hormone glands
The pancreas, thyroid and other glands can be affected. Some people develop high blood sugar or diabetes as a result of long-term iron build-up.
Skin and joints
Some people notice a darker, bronze or greyish tone to the skin. Joint aches can also appear. These changes are usually slow and easy to mistake for ageing.
Not sure whether this applies to you?
Ask an oncologistKeeping watch
How will your team check your iron level?
Counting your transfusions
Your team keeps a record of how many units of blood you have had. This running total is one of the simplest guides to how much iron may have built up. Keep your own copy of every transfusion slip.
Ferritin blood test
Ferritin is a protein that stores iron. A rising ferritin over several tests usually means iron is building up. One result on its own can mislead, because infection and inflammation also push it up.
An MRI scan, if needed
A special MRI can estimate how much iron sits in the liver and the heart. It is not needed for everyone. Your team may suggest it when the blood tests do not give a clear picture.
Kidney and liver tests
These are checked before any iron-removing medicine is started, and regularly afterwards, because the medicines can affect both organs.
On your report
What do the words on your iron report mean?
- Serum ferritin
- A blood test that reflects how much iron the body is storing. The trend over time matters more than one reading.
- Transferrin saturation
- How full the iron-carrying protein in your blood is. A high figure suggests the body has more iron than it can handle.
- Chelation
- Treatment with a medicine that grabs extra iron so the body can pass it out in urine or stool.
- Transfusion burden
- How often and how many units of blood you need. A heavier burden means iron builds faster.
- Reference range
- The normal band printed beside your result. It differs between laboratories, so compare results from the same lab where you can.
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Treatment
How does chelation remove iron, and who is it for?
Chelation medicines bind to spare iron and carry it out of the body. They lower iron slowly over months. They do not treat the MDS itself.
The medicines you may hear about
Deferasirox is a tablet taken by mouth and is the one most often used in MDS. Deferoxamine is given as a slow injection under the skin, usually with a small pump. Deferiprone is used less often in MDS, because it can lower the white cell count further. Your haematologist chooses the medicine and sets the dose. Never change or stop it on your own.
Who it tends to suit
Chelation is most often discussed for people with lower-risk MDS who need regular transfusions and who are expected to live with the condition for years. It may also be considered before a stem cell transplant.
Who it may not suit
It is often not a priority in higher-risk MDS, where treating the disease comes first. People with weak kidney function, or very low platelets or white cells, may not be able to take some of these medicines safely.
Commonly believed
What do families often get wrong about iron overload?
"If iron is the problem, we should cut down on transfusions."
A transfusion is given because your haemoglobin is too low to keep you safe. Skipping it risks breathlessness, falls and strain on the heart. Iron is managed alongside transfusions, not by refusing them.
"We will stop eating leafy greens and jaggery to lower the iron."
Iron from food is a very small amount next to the iron in a unit of blood. Cutting healthy foods makes little difference to overload and can weaken you. Ask your team before changing your diet.
"He feels fine, so the iron cannot be hurting him."
Iron damage is usually silent for a long time. By the time symptoms appear, some harm may already be done. Regular blood tests are how problems are caught early.
"Iron tablets from the chemist will help his low blood."
In MDS the low haemoglobin is usually not caused by a lack of iron. Extra iron tablets can add to the build-up. Never take iron supplements unless your haematologist has asked you to.
Day to day
What is it like to take chelation for a long time?
Chelation is usually a long commitment. Iron comes off slowly, so the medicine is taken for many months or longer, with regular checks.
Side effects to report
Stomach upset, loose motions and a skin rash are common in the early weeks and often settle. Changes in kidney or liver tests are watched closely. Tell your team straight away about any change in hearing or eyesight, severe stomach pain, or much less urine than usual.
Making the routine work
Take the medicine the same way each day, as your team has explained. Keep your blood test dates, because the dose is adjusted by your haematologist based on those results. If cost or supply is a worry, raise it early. There is often a way forward that does not mean simply stopping.
Questions we are asked
Common questions about iron overload and chelation
How many transfusions does it take before iron becomes a problem?
There is no single number that applies to everyone. Iron builds with each unit, and the rate depends on how often you need blood and your body size. Your haematologist watches your transfusion total and your ferritin trend together, and will tell you when iron is worth treating.
My ferritin is high. Does that always mean iron overload?
Not always. Ferritin also rises with infection, inflammation, liver problems and some other conditions. That is why your team looks at repeat results, your transfusion history and sometimes other tests. Reference ranges differ between laboratories, so one reading is never read on its own.
Can chelation make the MDS better?
Chelation is given to protect the organs from iron. It is not a treatment for the MDS itself. A small number of people see their counts improve slightly while on it, but this cannot be expected. Your MDS treatment plan is a separate decision made by your haematologist.
Can I take chelation tablets with my other medicines?
Often yes, but some medicines interact, including certain antacids and painkillers. Show your haematologist every medicine and supplement you take, including ayurvedic or home remedies. Do not start or stop anything on your own while on chelation.
Will I need chelation for the rest of my life?
It depends on whether you keep needing transfusions. If transfusions continue, chelation often continues too. If your blood counts improve and transfusions stop, your team may reduce or pause it. That decision is made from your test results, never by guessing.
Is iron overload the same as having too much iron from food?
No. Some people inherit a condition that makes them absorb too much iron from food. In MDS the extra iron comes mainly from transfused blood. The effects on the organs can look similar, but the cause and the way it is managed are different.
Is chelation covered by schemes or insurance?
Coverage varies. Aarogyasri, PM-JAY, CGHS, ECHS, EHS and many insurance policies may cover part of the cost when it is part of a treatment plan. Scheme rules change, so check the current position with your scheme or insurer. The CION team can help you ask the right questions.
What should we bring to the haematology appointment?
Bring every blood report, all transfusion slips or a written list of dates, any MRI reports and a list of medicines. Write down your questions beforehand. The haematology team will review the full picture, discuss it at a tumour board and explain what they recommend.
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
- American Cancer Society — Supportive Therapy for Myelodysplastic Syndromes
- National Cancer Institute — Myelodysplastic Syndromes Treatment (PDQ) - Patient Version
- NHLBI — Blood Transfusion
- Leukemia & Lymphoma Society — Myelodysplastic Syndromes
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.
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Worried about iron after many transfusions?
Share your transfusion history and recent reports. CION's haematology team will review them and explain what to watch for. One helpline serves every CION centre.