Principal Director and Head, Pediatric Hematology Oncology and Bone Marrow Transplant, Fortis Memorial Research Institute, Gurgaon, India
Part 8 of 14 in BMT in Sickle Cell Anaemia and Other Haematological Disorders
Matched Sibling vs Haploidentical Transplant for Sickle Cell Disease
August 6, 2026
A matched sibling donor gives the highest cure rates for sickle cell bone marrow transplant, but a haploidentical, or half-matched, transplant using a parent as donor is now a proven alternative when no full match is available. Dr. Vikas Dua explains both options in detail as part of his Jivo Masterclass on bone marrow transplant in India for sickle cell disease.
What Is a Matched Sibling Transplant?
A matched sibling transplant uses stem cells from a brother or sister whose tissue type, determined through HLA typing, closely matches the patient's own. Dr. Vikas Dua notes that there is only a 25 to 30% chance that a sibling will be a full match, which means most families will not have this option readily available.
What Is a Haploidentical Transplant?
A haploidentical transplant uses a half-matched donor, typically the patient's father or mother, since a parent is always a 50% genetic match to their child. This dramatically expands the pool of potential donors, since nearly every patient has at least one parent available and willing to donate. Dr. Vikas Dua highlights haploidentical transplant as a particularly important option for African patients, given that no country in Africa currently has an unrelated donor registry to fall back on.
Choosing Between the Two Donor Types
Where a matched sibling is available, it remains the preferred option because of its higher cure rate. Where no matched sibling exists, haploidentical transplant using a parent offers a strong alternative, with outcomes that, according to Dr. Vikas Dua, are now approaching those of matched sibling transplants. This flexibility is part of why bone marrow transplant in India has become accessible to a much wider range of sickle cell patients than in the past, when a matched donor was often impossible to find.
← Who Needs a Bone Marrow Transplant for Sickle Cell Disease? | Series index | HLA Typing and Donor Matching for Bone Marrow Transplant in India →
This article is based on a Jivo Masterclass session conducted by Dr. Vikas Dua, Principal Director and Head, Pediatric Hematology Oncology and Bone Marrow Transplant, Fortis Memorial Research Institute, Gurgaon, India. The article has been summarised with the assistance of an AI tool from the original masterclass recording. Watch the full Masterclass recording
This guide is based on a live Jivo Masterclass — Dr. Vikas Dua taught doctors across Africa on July 28, 2024.
FROM THE LIVE Q&A
Dr. Paul
What is the umbilical cord transplant about, and is it done for all babies or just sickle cell patients?
Dr. Vikas Dua
When a newborn baby is born, from the placental side of the cord, 25 ml of stem cells are collected and go to a public bank or a private bank, and later, if you want to do a transplant, you can use that unit. You can do it for any condition, but in India we don't prefer cord blood transplants because there are quite a number of issues with them — that's why we prefer adult donor transplants over a cord blood unit.
Frequently Asked Questions
Is there a possibility for transplant in prostate cancer, and are there only two donor registry banks in the world?▼
There is no role of bone marrow transplant in prostate cancer — none, and no research on it either. On registries: the biggest bank is in Germany, the second biggest in the US, but there are many other banks in other parts of the world — there isn't even a single bank in Africa. That's one of the reasons transplants aren't happening in Africa, other than South Africa and some in Benin City, Nigeria. All of you need to come together and have your own registry, so that if somebody requires stem cells, you have your own bank — you people have to come out with the solution.
Can the same principles apply in children with cerebral palsy?▼
That's a very good question, but there is no role of bone marrow transplant in cerebral palsy. There are researches going on about whether transplant helps for cerebral palsy, but we don't have an answer in black and white — at the present moment there is no indication for doing a transplant for cerebral palsy.
Is there any age limit for successful bone marrow transplant in sickle cell disease?▼
Sooner is better — it is better to do a transplant early — but we have done transplants even for adults. I showed a picture of a Nigerian person, Mr. Buhari, whose transplant was done at the age of 34, and he's doing well.
How much does the treatment cost, including accommodation, if the patient travels to India, and how long would they stay?▼
For a matched sibling donor transplant, roughly it is around $25,000 for the transplant; for a half-match transplant it is around $35,000. For accommodation and other logistics you need $10,000 more — so roughly $35,000 for a full match and $45,000 for a half match. The stay is around three months.
How do you find HLA compatible donors, and if they have to be found in the family, what criteria are used?▼
We do HLA typing of the patient and siblings — there's a 25 to 30% chance the siblings are a complete match to the patient on HLA. So you need to do HLA typing and you will come to know whether you have a full match in the family or not.
What is the main advantage of a matched sibling donor transplant?▼
A matched sibling donor gives the highest cure rates for sickle cell bone marrow transplant, though only 25 to 30% of patients will have a sibling who is a full match.
Who can serve as a haploidentical donor?▼
A haploidentical transplant typically uses the patient's father or mother as donor, since a parent is always a 50% genetic match to their child.
How do outcomes for haploidentical transplant compare to matched sibling transplant?▼
Outcomes for haploidentical transplant are now approaching those of matched sibling transplants, making it a strong alternative when no matched sibling is available.
Which donor type is preferred when both options are available?▼
Where a matched sibling is available, it remains the preferred option because of its higher cure rate. Haploidentical transplant using a parent is used when no matched sibling exists.
In This Series: BMT in Sickle Cell Anaemia and Other Haematological Disorders
- 1.Bone Marrow Transplant for Sickle Cell Anaemia
- 2.Why Africa Has No Bone Marrow Donor Registry, and How Haploidentical Transplant Solves It
- 3.What Is the Best Age for Bone Marrow Transplant in Sickle Cell Disease?
- 4.Bone Marrow Transplant for Thalassemia in India
- 5.Cord Blood Transplant for Sickle Cell Disease: Is It Used in India?
- 6.Cost of Bone Marrow Transplant for Sickle Cell Anaemia in India
- 7.HLA Typing and Donor Matching for Bone Marrow Transplant in India
- 8.Matched Sibling vs Haploidentical Transplant for Sickle Cell Disease
- 9.Non-Myeloablative Conditioning: Reducing Infertility Risk in Sickle Cell BMT
- 10.Life After Bone Marrow Transplant: Recovery and Immunosuppression
- 11.Who Needs a Bone Marrow Transplant for Sickle Cell Disease?
- 12.Cure Rates for Sickle Cell Bone Marrow Transplant: What the Data Shows
- 13.Sickle Cell Disease Burden in Africa: Why Bone Marrow Transplant Matters
- 14.What Is Bone Marrow Transplant and How Does It Cure Sickle Cell Anaemia?