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Fanconi anaemia: when marrow failure runs in the family | CION Cancer Clinics
Fanconi anaemia is a rare inherited condition in which the bone marrow slowly stops making enough blood cells. It is present from birth, though counts often fall only in childhood or later. It can look like ordinary aplastic anaemia on a report, yet it needs different tests, a different treatment plan and lifelong cancer checks. This page explains the signs, the tests and what it means for brothers and sisters. 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 is Fanconi anaemia?
- How is it different from ordinary aplastic anaemia?
- What signs make a doctor think of Fanconi anaemia?
- Which tests confirm it?
- How is Fanconi anaemia treated?
- What do families often get wrong about it?
- What does it mean for brothers, sisters and future children?
- Common questions about Fanconi anaemia
The short answer
What is Fanconi anaemia?
Fanconi anaemia is a rare condition passed down in families, in which the bone marrow slowly stops making enough blood cells. It is present from birth, even when the counts only fall years later.
Why it is called inherited marrow failure
Your bone marrow is the soft tissue inside the bones where red cells, white cells and platelets are made. In Fanconi anaemia, the cells cannot repair certain kinds of damage to their DNA, the genetic instructions inside every cell. Over time the marrow wears out. Haemoglobin, white cells and platelets all drop, often together. Doctors group it with a small family of similar conditions called inherited bone marrow failure syndromes.
Who it usually affects
Most children are diagnosed in childhood, often because of low blood counts, frequent bruising, or physical differences noticed at birth. Some people are only diagnosed as young adults, sometimes after they react very badly to chemotherapy given for another reason. Boys and girls are affected equally. It is more common in communities where marriage between relatives is usual, which matters for many families in Telangana and Andhra Pradesh.
Why the name matters for treatment
It can look exactly like acquired aplastic anaemia on a blood report. The treatment plan is very different, so ruling it out early is one of the most useful things your haematologist can do.
This page explains the condition. It cannot tell you whether your child or you have it. Only specific tests can.Side by side
How is it different from ordinary aplastic anaemia?
Fanconi anaemia (inherited)
Acquired aplastic anaemia
Caused by a gene change present from birth
Usually caused by the immune system attacking the marrow later in life
Brothers and sisters may carry the same condition
Not usually shared by other family members
Often comes with physical signs such as short height, thumb differences or skin patches
No physical signs beyond those of low counts
Immune-calming treatment such as ATG does not fix the cause
Immune-calming treatment is one of the main options
Needs lifelong checks for certain cancers
Needs follow-up of counts, with a different set of long-term risks
Not sure whether this applies to you?
Ask an oncologistWhat families notice
What signs make a doctor think of Fanconi anaemia?
No single sign proves it. Many children with the condition look entirely well, so a normal appearance does not rule it out.
Low blood counts
Tiredness, pale skin, easy bruising, nosebleeds or infections that keep coming back. These come from the marrow making too few cells.
Often seen on the report
- Low haemoglobin
- Low platelet count
- Red cells larger than usual
Differences present at birth
A missing or unusually shaped thumb, a small head, short height, or differences in the kidneys, heart or ears. Around a third of people with the condition have none of these.
Skin changes
Light brown patches, sometimes called café-au-lait spots, or areas of lighter or darker skin. On their own they are common and mean very little.
A family pattern
A brother or sister with the same diagnosis, parents who are related by blood, or a relative who had marrow failure or an early cancer of the mouth or throat.
Tell your doctor about any marriage between relatives in the family. It is a medical question, not a judgement.Getting a diagnosis
Which tests confirm it?
Blood counts and a smear
A complete blood count and a look at the cells under the microscope. This shows how low the counts are, but it cannot tell inherited from acquired marrow failure.
Bone marrow test
A small sample of marrow is taken from the hip bone. It shows how empty the marrow is and checks for early signs of other blood conditions, such as MDS.
Chromosome breakage test
Blood cells are exposed to chemicals in a laboratory. Cells from a person with Fanconi anaemia break far more than normal cells. This is the key screening test, done only at specialised laboratories.
Genetic testing
A gene panel looks for the exact gene change. Knowing it helps test brothers and sisters, plan any future pregnancy, and choose a safe donor if a transplant is needed.
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Treatment and follow-up
How is Fanconi anaemia treated?
Treatment depends on how low the counts are and whether any other blood condition has developed. When the counts are still steady, the plan is usually careful watching, with regular blood tests and marrow checks.
When the marrow fails
Transfusions of red cells or platelets support the counts while a longer plan is made. Some people are offered a hormone-based medicine that can lift the counts for a time. A stem cell transplant is the only treatment that replaces the failing marrow. It is carried out at specialised transplant centres, using a gentler conditioning plan, because people with Fanconi anaemia are very sensitive to chemotherapy and radiation.
Who a transplant does not suit
It is not usually offered while the counts are stable, because the risks of transplant then outweigh the benefit. A brother or sister can only be a donor after tests show they do not have the condition too.
The long watch for cancer
Even after a successful transplant, the rest of the body still carries the gene change. The risk of mouth, throat and gynaecological cancers stays higher for life. Regular mouth and dental checks, avoiding tobacco, gutka and alcohol, and following the screening plan your team sets make a real difference.
CION's haematology team reviews the reports, discusses the case at a tumour board and coordinates referral to qualified transplant and testing centres. Ask where each test will be done.Commonly believed
What do families often get wrong about it?
"Our child looks normal, so it cannot be an inherited condition."
Many children with Fanconi anaemia have no visible differences at all. The chromosome breakage test, not the child's appearance, is what settles the question.
"It is the mother's fault."
In most families both parents quietly carry one changed copy of the gene and are completely healthy. Neither parent caused it, and neither could have known. Blame only makes a hard time harder.
"A transplant ends every problem."
A transplant replaces the marrow, not the rest of the body. Hormone, growth, fertility and cancer checks continue for life, so follow-up matters as much after a transplant as before it.
"Tonics and iron will build the blood back up."
The marrow is not short of iron. Extra iron or tonics will not fix a gene change, and too much iron can harm the liver and heart, especially in someone having transfusions.
For the whole family
What does it mean for brothers, sisters and future children?
Most forms of Fanconi anaemia pass on when both parents carry one changed gene. In each pregnancy, there is a one in four chance that the child will have the condition. Brothers and sisters of an affected child should be offered testing, even if they feel well.
Genetic counselling
A genetic counsellor explains the test results in plain words, what they mean for other relatives, and the choices available for any future pregnancy. Ask for this before deciding anything about family planning. It is also the right place to raise questions about relatives' marriages without anyone feeling blamed.
What this page cannot tell you
Fanconi anaemia varies a great deal between people, even within one family. This page cannot tell you how your child's condition will progress or how they will respond to treatment. That picture comes from the tests, the gene change found and repeated reviews by a haematologist who knows the case.
Questions we are asked
Common questions about Fanconi anaemia
Is Fanconi anaemia a type of blood cancer?
No. It is an inherited condition of the bone marrow, not a cancer. It does raise the chance of some cancers later, including a leukaemia called AML, MDS, and cancers of the mouth and throat. That is why regular follow-up with a haematologist continues even when the counts look steady.
Can adults be diagnosed with Fanconi anaemia?
Yes. Some people have mild signs and are only diagnosed as teenagers or adults. Sometimes the first clue is an unusually severe reaction to chemotherapy, or an early mouth or throat cancer. If marrow failure appears in a young adult, testing for an inherited cause is often part of the work-up.
Why does it matter whether the marrow failure is inherited?
Because the treatment changes. Immune-calming treatment used for acquired aplastic anaemia does not fix an inherited cause. A transplant needs a gentler plan. A brother or sister must be tested before being chosen as a donor. Getting this right early avoids harm later.
Where is the chromosome breakage test done?
Only in specialised laboratories, and not every city has one. Your haematologist arranges for the sample to be sent. Ask how the blood will travel, how long the result usually takes, and whether a genetic test will follow. Results from an unknown laboratory may need to be repeated.
Should our other children be tested?
Usually yes. Brothers and sisters can have the condition without symptoms, and testing them also shows whether they could be a safe donor. Talk to your haematologist and a genetic counsellor about which test suits each child and when to do it.
Can my child go to school and play normally?
Most children can, while their counts allow. If the platelet count is low, your team may ask you to avoid contact sports. If white cells are low, crowded places during outbreaks of infection may need care. Ask the team for guidance matched to your child's latest report.
Are there things we should avoid at home?
Tobacco in any form, gutka, paan and alcohol raise the risk of mouth and throat cancer, so keep the child away from smoke and never start these later. Avoid unnecessary X-rays. Do not give tonics, iron or herbal medicines without asking the haematologist first.
What should we ask at the first haematology appointment?
Ask whether inherited marrow failure has been ruled out, which tests are needed and where they will be done. Ask how often counts will be checked, whether siblings should be tested, and which signs mean you should come in the same day. Bring every earlier report you have.
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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 — Aplastic anaemia
- National Heart, Lung, and Blood Institute — Aplastic Anemia
- MedlinePlus Genetics (US National Library of Medicine) — Fanconi anemia
- National Cancer Institute — Genetics of 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.
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