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Inherited bone marrow failure syndromes and cancer risk | CION Cancer Clinics
Inherited bone marrow failure syndromes are rare conditions, present from birth, in which the marrow cannot keep up with making blood cells. Several of them also raise the risk of MDS, leukaemia and some cancers of the mouth, throat and skin. Recognising one changes how treatment is planned, who can safely donate stem cells, and which relatives should be tested. At CION Cancer Clinics, our oncologists plan screening and care for families with an inherited cancer syndrome, explained in plain words.
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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 an inherited bone marrow failure syndrome?
- Which bone marrow failure syndromes carry a cancer risk?
- How do doctors tell an inherited marrow failure from an acquired one?
- What do the words on a marrow or genetic report mean?
- Acquired or inherited: what changes?
- What this page cannot tell you
- Four things families believe about marrow failure, and what is true
- Common questions about bone marrow failure syndromes
The short answer
What is an inherited bone marrow failure syndrome?
It is a rare condition, present from birth, in which the bone marrow cannot make enough healthy blood cells. Over time the blood counts fall. Several of these conditions also raise the risk of blood cancers such as MDS and acute myeloid leukaemia, and some raise the risk of cancers of the mouth, throat and skin as well.
How it differs from ordinary marrow failure
Most adults whose marrow stops working have acquired aplastic anaemia, meaning the immune system has attacked the marrow later in life. Nothing was inherited and nothing can be passed on. In an inherited syndrome, the fault is in the genes of every cell, and brothers, sisters and children may carry it too.
Why the difference matters so much
The two are treated differently. Some inherited syndromes make the body very sensitive to chemotherapy and radiation, so standard doses before a transplant can do serious harm. A brother or sister offered as a stem cell donor may quietly carry the same condition. Knowing which kind you are dealing with protects the patient and the family.
Many of these conditions are found in childhood, but some are first recognised in adults.The main conditions
Which bone marrow failure syndromes carry a cancer risk?
These are the four your haematologist is most likely to mention. Each has its own genes and its own pattern of risk.
Fanconi anaemia
An inherited failure of DNA repair that slowly empties the marrow. It raises the risk of leukaemia and, later, of mouth, throat and genital cancers.
Often looks like
- Differences in the thumbs or forearms
- Short height or low birth weight
- Brown patches on the skin
Telomere biology disorders
Also called short telomere syndromes or dyskeratosis congenita. The caps on the ends of chromosomes are too short, so cells wear out early. Marrow, lungs and liver can all be affected.
Early greying, ridged nails and white patches in the mouth can be clues.Shwachman-Diamond syndrome
A low white cell count together with poor digestion from the pancreas, often noticed in infancy as poor growth and loose, oily stools. It carries a raised risk of MDS and leukaemia.
Diamond-Blackfan anaemia
The marrow fails to make red cells, usually from the first year of life. The risk of MDS, leukaemia and a few solid cancers is higher than usual.
Not sure whether this applies to you?
Ask an oncologistHow it is found
How do doctors tell an inherited marrow failure from an acquired one?
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Low blood counts are found
A routine blood test shows low red cells, white cells or platelets. When all three are low it is called pancytopenia. Tiredness, bruising or repeated infections are the usual reasons for the test.
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A bone marrow test
A small sample from the hip bone shows whether the marrow is empty, abnormal or already changing towards MDS or leukaemia.
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Targeted screening tests
A chromosome breakage test on blood looks for Fanconi anaemia. A telomere length test looks for a short telomere syndrome. These are done before any treatment decision.
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A gene panel
Blood or skin cells are tested for faults in the known marrow failure genes. Skin is sometimes used because blood cells can give a misleading result in these conditions.
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The family is offered testing
Brothers and sisters, especially anyone considered as a stem cell donor, are checked for the same fault before a transplant is planned.
On your report
What do the words on a marrow or genetic report mean?
- Aplastic anaemia
- A marrow that makes too few blood cells of every type. It can be inherited or acquired.
- MDS
- Myelodysplastic syndrome. The marrow makes faulty cells, and it can progress to leukaemia.
- Chromosome breakage test
- A blood test that stresses cells with a chemical to see whether their DNA breaks easily, as it does in Fanconi anaemia.
- Telomeres
- Protective caps on the ends of chromosomes, like the plastic tips on shoelaces.
- Germline
- Present in every cell from birth and able to pass to children. This is what inherited testing looks for.
- Autosomal recessive
- Both parents pass on a faulty copy. The parents are usually healthy carriers.
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Acquired or inherited: what changes?
Inherited marrow failure
Acquired aplastic anaemia
Gentler transplant preparation is usually needed
Standard treatment plans apply
Sibling donors must be tested first
A matched sibling can usually donate directly
Lifelong checks for other cancers
Follow-up focuses on the marrow
Relatives and future pregnancies are discussed
No family testing is needed
Being straight with you
What this page cannot tell you
It cannot tell you whether your child or relative has an inherited syndrome. That needs a haematologist, a marrow test, the right screening tests and often a gene panel. If a result has already come back, what your specific variant means is a question for the counsellor who ordered the test.
Where the evidence is thin
These conditions are rare, and cancer risks come mainly from registries in Europe and North America. Fanconi anaemia is seen more often in communities where cousin marriage is common, including parts of India, but Indian registries are small. How the risks apply here is not fully known.
Who this does not apply to
Most people with low blood counts do not have an inherited syndrome. A low haemoglobin from iron deficiency, a low platelet count after a viral fever, or acquired aplastic anaemia in an older adult are all far more common. Your haematologist will only look for an inherited cause when the pattern suggests one.
If you are unsure why these tests have been suggested, ask your haematologist to explain what they are looking for.Commonly believed
Four things families believe about marrow failure, and what is true
"Inherited conditions always show up in babies."
Many are found in childhood, but some people reach adulthood with mild or no signs. A first diagnosis in the twenties or thirties is well recognised.
"A healthy brother is the perfect donor."
A brother can look well and still carry the same condition. Using his stem cells could pass the problem on. Donors in these families are tested before they are chosen.
"Neither parent is ill, so it cannot be inherited."
Several of these conditions are recessive. Both parents are healthy carriers, and the condition only appears when a child inherits a faulty copy from each.
"Once the transplant is done, the cancer risk is gone."
A transplant replaces the marrow. The rest of the body still carries the gene fault, so checks of the mouth, throat and skin continue for life in some syndromes.
Questions we are asked
Common questions about bone marrow failure syndromes
Does every inherited marrow failure lead to cancer?
No. These conditions raise the risk of certain cancers, but many people never develop one. The risk differs between syndromes and between families. Regular checks aim to find any change early, when there are more options for treatment.
Why does the chromosome breakage test matter before treatment?
People with Fanconi anaemia are very sensitive to chemotherapy and radiation. If the condition is missed, standard treatment before a transplant can cause severe harm. The test lets the team plan gentler treatment when it is needed.
Can an adult be diagnosed for the first time?
Yes. Telomere disorders in particular are sometimes first found in adults, occasionally after lung scarring, liver problems or a poor reaction to cancer treatment. Some adults with Fanconi anaemia have very few physical signs.
Should brothers and sisters be tested?
Usually yes, once a fault is known in the family, and always before a sibling donates stem cells. Your counsellor will explain what a result would mean for each of them, including those who feel completely well.
We married within the family. Does that matter?
It can, for recessive conditions such as Fanconi anaemia and Shwachman-Diamond syndrome. Related parents are more likely to carry the same faulty gene. A counsellor can explain the chance for future pregnancies and the testing options available.
What checks are needed after diagnosis?
Regular blood counts and periodic marrow tests are standard. Depending on the syndrome, checks of the mouth, throat, skin, lungs or liver may be added. Your haematologist will set a schedule based on the exact condition and the person's age.
Is this the same as testing the leukaemia itself?
No. Inherited testing looks at genes present from birth. Tests on leukaemia cells look for faults that arose in the cancer and guide its treatment. Those are covered in our targeted therapy pages.
Where do we start?
If low blood counts have no clear cause, ask the haematologist whether an inherited marrow failure has been considered. Bring any old blood reports and a note of relatives with blood problems. The CION helpline can point you to the right clinic.
Your Specialists
Meet CION's oncologists. Bring your family history or genetic report to them.
Our medical oncologists see people with a strong family history of cancer, arrange genetic counselling and testing where it fits, and plan the checks that follow.
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)
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Sources
- MedlinePlus Genetics — FANCA gene
- GeneReviews (NCBI) — Dyskeratosis Congenita and Related Telomere Biology Disorders
- MedlinePlus Genetics — Shwachman-Diamond syndrome
- MedlinePlus Genetics — Dyskeratosis congenita
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
Inherited predisposition to leukaemia and MDSThe wider picture of inherited blood cancer riskClues that a blood cancer may be inheritedThe signs that prompt a haematologist to askTesting before a family stem cell donationWhy a sibling donor is checked before transplantFanconi anaemia genes: what they doThe DNA repair genes behind the commonest syndrome
Talk to us
Low blood counts and no clear reason why?
Tell us what the blood reports show and whether anyone else in the family has had blood problems. We will tell you honestly whether an inherited cause is worth looking for and arrange it if so. One helpline serves every CION centre.