Bone Marrow Transplant Explained: A Complete Guide by Dr. Ritu Jain, Jaslok Hospital

Bone marrow transplant is one of the most life-changing procedures in modern medicine — and also one of the most misunderstood. In this episode of Just Health for the People, a public health awareness initiative by Jaslok Hospital, host Jitendra Hariyan speaks with Dr. Ritu Jain, Director of the Bone Marrow Transplant Department at Jaslok Hospital, whose center is one of the leading private-sector bone marrow transplant units in Western India, having performed over 675 transplants to date.

What Is a Bone Marrow Transplant?

Bone marrow is a liquid substance found inside our bones — particularly at the ends of long bones — responsible for producing hemoglobin, white blood cells, and platelets. Just as we transplant a failing organ like a liver, kidney, or heart, a bone marrow transplant replaces a patient's non-functioning bone marrow with healthy marrow or stem cells, either from the patient themselves or from a donor. It is considered a curative procedure for patients with blood cancers or bone marrow failure who have no other treatment options left.

Who Needs a Bone Marrow Transplant?

This procedure is offered to both children and adults, depending on the underlying condition:
 

In children:

• Bone marrow failure conditions
• Thalassemia major
• Sickle cell disease
• Inborn errors of metabolism, where the bone marrow doesn't function optimally
   

In adults:

• Blood cancers such as AML (Acute Myeloid Leukemia), ALL (Acute Lymphoblastic Leukemia), lymphoma, and myeloma
• Aplastic anemia, where the bone marrow fails entirely

Bone Marrow Transplant vs. Stem Cell Transplant: Same Thing?

Dr. Jain clarifies that "bone marrow transplant" is now somewhat of an outdated term. Since stem cells can be collected directly from blood rather than the bone marrow itself, the medical community now refers to this procedure as stem cell transplant.

Types of Stem Cell Transplants

1. Autologous Transplant

The patient's own stem cells are collected beforehand, followed by high-dose chemotherapy, after which the collected stem cells are given back to help the bone marrow recover quickly. Technically, this isn't a "transplant" in the traditional sense since no donor is involved — it's used to speed up bone marrow recovery after intensive chemotherapy.
 

2. Allogeneic Transplant

This requires a donor and includes several subtypes:

• Full-match sibling donor transplant: Siblings have roughly a 25% chance of being a full match
• Haploidentical (half-match) transplant: Using a parent or child as a donor, who typically shares a 50% HLA match
• Matched unrelated donor transplant: Sourced through stem cell donor registries when no suitable family donor is available
   

3. Umbilical Cord Blood Transplant

Stem cells collected from the placenta and umbilical cord after childbirth represent the purest form of stem cells. However, due to limited quantity, this option is generally viable only for pediatric patients and has become less commonly used in recent years.

Dr. Jain notes that autologous and allogeneic transplants remain the two main forms of transplant therapy offered today.

What Is HLA Typing?

Just as everyone has a blood group, each person also has a unique HLA (Human Leukocyte Antigen) type, inherited 50% from each parent. This is why full siblings have roughly a 25% chance of being a complete match, while parents or children typically share a 50% match. HLA typing can be done via blood or saliva samples and is a prerequisite before identifying a suitable donor.

How Does the Bone Marrow Harvesting and Transplant Process Work?

Contrary to popular belief (often shaped by misinformation on social media), the procedure does not involve any surgery or operating theatre in most modern cases. Here's how it typically works:

1. Donor identification and HLA typing
2. Pre-transplant fitness evaluations for both donor and recipient (kidney, liver, heart function)
3. Patient preparation: A catheter is placed, and the patient is shifted into BMT isolation for 7 days of high-dose chemotherapy (and sometimes radiation therapy), aimed at completely destroying abnormal or cancerous cells to prevent future relapse
4. Donor stimulation: The donor receives daily growth factor injections for four days to boost white blood cell counts and mobilize stem cells into the bloodstream
5. Stem cell collection: Using a specialized machine (similar to blood/platelet donation), stem cells are collected from the donor's blood over a 3–4 hour outpatient procedure — the donor can watch TV, have family present, and go home the same evening
6. Stem cell infusion: The collected stem cells (measured as CD34 cells, dosed according to patient weight) are infused into the patient like a blood transfusion.

The Critical Recovery Period

After the stem cell infusion, the most critical and potentially life-threatening phase begins, as the patient's white blood cells and platelets drop to near zero following high-dose chemotherapy. The infused stem cells gradually establish a new, functioning bone marrow — a process that typically unfolds over about three weeks:

• Week 1: High-dose chemotherapy to eliminate the old bone marrow
• Week 2: Waiting period for new cells to begin engraftment
• Week 3: Blood counts normalize, and the patient is discharged if stable

Typical hospital stay: 2–3 weeks (allogeneic), slightly shorter for autologous transplants (around 2–2.5 weeks), followed by 3 months of outpatient follow-up.

Risks and Complications of Bone Marrow Transplant

Dr. Jain outlines the main categories of risk:

• Infections (bacterial, fungal, viral) during the low blood-count period, managed using isolation in specialized HEPA-filtered rooms (Jaslok Hospital has seven such rooms)
• Chemotherapy and radiation side effects, including mouth sores, diarrhea, vomiting, hair loss, and taste changes
• Graft-versus-host disease (GVHD) — a reaction where donor cells (recognized as "foreign" by the recipient's body) react against the patient's tissues. This can range from mild to severe, and in rare cases, can be life-threatening.

Do Transplant Patients Need Lifelong Medication?

Unlike solid organ transplants (liver, kidney), which carry an ongoing lifelong risk of rejection requiring permanent immunosuppressive medication, bone marrow transplant patients typically require immunosuppressive drugs for only six months to a year, after which most patients are gradually weaned off. Dr. Jain refers to this as a "liquid transplant," distinct from solid organ transplantation.

Patients with more severe forms of GVHD (affecting eyes, mouth, or lungs) may require longer-term medication — sometimes 3–5 years, and occasionally lifelong steroids — though this applies to a minority of patients.

What Happens If the Transplant Fails or the Disease Relapses?

Roughly 15–20% of patients face a risk of relapse after transplant, with the risk being significantly lower when the transplant is performed at an earlier disease stage compared to a later, more advanced stage. For patients who do relapse, newer treatment options are available, including:

• CAR T-cell therapy
• Bite-specific immunotherapies
• Other emerging immunotherapies with encouraging clinical trial results

Jaslok Hospital currently has the infrastructure to offer CAR T-cell therapy in select cases and is preparing to begin commercial CAR T programs and clinical trials.

What Does a Bone Marrow Transplant Cost?

Approximate cost estimates shared by Dr. Jain (uncomplicated cases):

• Autologous transplant: ₹10–15 lakh
• Allogeneic (sibling-matched) transplant: ₹15–20 lakh
• Haploidentical or matched unrelated donor (MUD) transplant: ₹30–35 lakh.

Long-Term Effects of Bone Marrow Transplant in Children

For pediatric patients, two significant long-term considerations include:

• Growth stunting — reduced height or growth compared to peers.
• Fertility issues — particularly relevant for male adolescents; in females, permanent ovarian damage can lead to premature menopause.

Emotional and Financial Support for Patients and Families

Recognizing that a bone marrow transplant journey is emotionally, physically, and financially demanding, Jaslok Hospital's transplant unit focuses on supporting all dimensions of patient wellbeing — emotional, psychological, physical, mental, psychosocial, and financial. This includes:

• Experienced in-house counselors with 15–20 years of dedicated experience
• Specially trained nursing staff who provide continuous, round-the-clock care during isolation
• A fully integrated in-house team — including blood bank, infectious disease specialists, and immunologists — reducing the need to depend on external facilities
• Social worker and management support, including trustee-funded financial assistance for patients facing financial hardship
• Patient support groups, where survivors counsel new patients and share their experiences — something Dr. Jain notes often resonates more deeply with patients than formal medical counseling.

Why Choose Jaslok Hospital for Bone Marrow Transplant

Dr. Jain highlights several factors behind the program's long-standing success:

• A self-sufficient, in-house ecosystem covering every aspect of transplant care
• Excellent 30-day post-transplant mortality outcomes, comparable to leading centers globally
• A smaller, more personalized unit, allowing individualized patient care
• Strong institutional and social work support, which enabled the hospital to take on newer, more complex procedures like haploidentical transplants early in India.

Key Takeaways

Bone marrow (stem cell) transplant is a complex but often life-saving and curative treatment for blood cancers and bone marrow failure conditions. While the procedure itself does not involve surgery, careful management of infection risk, chemotherapy side effects, and graft-versus-host disease is essential for successful outcomes. With continued advancements — including CAR T-cell therapy — and strong multidisciplinary support systems, patients today have more hope and better outcomes than ever before.
 

This article is based on an episode of Just Health for the People, a public health awareness initiative by Jaslok Hospital, featuring Dr. Ritu Jain, Director of Bone Marrow Transplant. Watch the full video here: Bone Marrow Transplant Explained by Dr. Ritu Jain

For consultation regarding blood cancer treatment, bone marrow/stem cell transplant eligibility, or donor evaluation, please reach out to Jaslok Hospital's Department of Bone Marrow Transplant.