What Is a Bone Marrow Transplant — And Who Actually Needs One?

Bone marrow transplant is one of medicine's more misunderstood procedures. People sometimes imagine it as an operation — something done in a theatre with instruments and incisions. It is actually much closer to a blood transfusion. The dramatic part is not the transplant itself but everything that leads up to it.

What Bone Marrow Does

Bone marrow is the spongy tissue inside bones — particularly the hip, sternum, and large bones of the arms and legs. It is the body's blood cell factory. Every day, it produces millions of red blood cells, white blood cells, and platelets. All of these originate from stem cells that live in the marrow.

When the marrow goes wrong — when it produces abnormal blood cells, as in leukaemia, or stops producing blood cells adequately, as in aplastic anaemia — the consequences are severe. Without functioning red cells, oxygen delivery fails. Without white cells, infection cannot be fought. Without platelets, bleeding does not stop.

Bone marrow transplant replaces this factory. Diseased stem cells are destroyed and replaced with healthy ones that can resume normal blood cell production.

Types of Bone Marrow Transplant

1. Autologous Transplant

The patient's own stem cells are collected before high-dose chemotherapy, frozen, and stored. After the chemotherapy destroys the diseased marrow, the stored stem cells are thawed and reinfused. They travel to the marrow cavity and restart blood cell production.

No donor is needed. No risk of rejection. The immune system that reconstitutes is genetically the patient's own. Autologous transplant is used primarily for multiple myeloma, Hodgkin's lymphoma, and some non-Hodgkin's lymphomas.

2. Allogeneic Transplant

Stem cells come from a donor — ideally a sibling with a full HLA match (a matching of surface proteins on immune cells). The donor's stem cells are collected either from the bone marrow directly (under general anaesthesia in an operating theatre) or more commonly from the blood after the donor is given growth factor injections to push stem cells out of the marrow into circulation.

After infusion into the recipient, the donor's stem cells engraft in the marrow and produce blood cells. But they produce a donor immune system — one that may recognise the recipient's body as foreign. This graft-versus-host disease (GVHD) is the main complication of allogeneic transplant, and managing it requires careful immunosuppression.

The upside of a donor immune system is the graft-versus-leukaemia effect — the donor immune cells can recognise and attack any residual leukaemia cells. This is part of why allogeneic transplant can be curative for acute leukaemia in a way that autologous transplant is not.

3. Haploidentical Transplant

A half-matched donor — typically a parent or adult child, who shares roughly half the HLA markers. Modern techniques for managing haploidentical transplant have improved substantially, making it a viable option when no fully matched sibling is available. Available at Prime Medical's partner hospitals.

Who Needs a Bone Marrow Transplant

1. Acute Myeloid Leukaemia (AML) — allogeneic BMT in first or second remission for intermediate and high-risk patients. The decision depends on the cytogenetics and molecular profile of the AML.

2. Acute Lymphoblastic Leukaemia (ALL) — allogeneic BMT for high-risk patients and those in second remission after relapse. Philadelphia-positive ALL particularly benefits.

3. Multiple Myeloma — autologous BMT after initial chemotherapy induction is standard for eligible patients under approximately 70 years.

4. Hodgkin's Lymphoma — autologous BMT for relapsed or refractory disease.

5. Non-Hodgkin's Lymphoma — autologous or allogeneic depending on subtype and response.

6. Aplastic Anaemia — allogeneic BMT in younger patients with severe aplastic anaemia and a matched sibling donor.

7. Thalassaemia and Sickle Cell Disease — allogeneic BMT is potentially curative in younger patients, eliminating dependence on blood transfusions. Relevant for patients from West Africa (Gambia, Nigeria) where haemoglobinopathies are common.

The Transplant Process — What Happens

1. Conditioning phase (one to two weeks): High-dose chemotherapy, sometimes with radiation, to destroy the existing marrow. The patient is in hospital throughout, in isolation to prevent infection while the immune system is absent.

2. Infusion day: The stem cells — whether from the patient's own stored supply (autologous) or from the donor (allogeneic) — are infused through an intravenous line. The procedure looks like a blood transfusion. It takes a few hours.

3. Engraftment (two to four weeks): The stem cells circulate and home to the marrow. They begin producing blood cells. Blood counts — initially zero — begin to recover. The patient is in strict isolation, vulnerable to infections, receiving blood and platelet transfusions to bridge the gap. Daily blood counts track engraftment progress.

4. Post-engraftment (two to four weeks): Once blood counts are recovering and the patient is stable, the next phase of monitoring begins. For allogeneic transplant, this is when GVHD surveillance intensifies.

Total time in India from admission to discharge: six to ten weeks for most BMT cases.

Bone Marrow Transplant at Prime Medical's Partner Hospitals

Max Super Speciality Hospital, Saket, Delhi (JCI, NABH, NABL) — Dr. Rohit Nayyar manages cancer care including haematology and BMT coordination. Max Hospital has a dedicated BMT unit with isolation rooms and experienced haematology team.

Indraprastha Apollo Hospital, New Delhi (JCI, NABH) — Full BMT programme including autologous, allogeneic, and haploidentical transplant. Dedicated Africa desk.

Fortis Memorial Research Institute, Gurugram (JCI, NABH, NABL) — Haematology and BMT alongside the broader oncology programme.

For patients from Addis Ababa, Kampala, Dar es Salaam, or Banjul with a leukaemia, lymphoma, or blood disorder diagnosis: share haematology reports and HLA typing results (if done) with Prime Medical Solutions. A specialist reviews within 48 hours.

To book a consultation, call the number on our website.