Bone Marrow Transplant: What, When & How?
What is a Bone Marrow Transplant?
A bone marrow transplant is a surgical procedure to replace damaged or destroyed cells with healthy bone marrow stem cells. It is the spongy tissue inside your bones where blood cells are made.
Bone marrow stem cells are immature cells that develop into red blood cells, white blood cells, and platelets. A bone marrow transplant may be used to treat leukemia, lymphoma, and certain types of anemia.
What conditions lead to Bone Marrow Transplants?
There
are two broad groups of conditions that necessitate a BMT:
Cancerous Conditions
●
Acute Myeloid and Lymphoblastic
Leukemia
● Chronic
Myeloid and Lymphoblastic Leukemia
● Hodgkin’s
and Non-Hodgkin’s Lymphoma
● Myelodysplastic
Syndrome
● Myeloproliferative
Neoplasms, Primary Myelofibrosis, etc.
●
Multiple Myeloma
Non-Cancerous Conditions
●
Aplastic Anaemia
● Hemoglobinopathies
like Thalassemia and Sickle Cell Anaemia
● Immuno-deficiencies
disorders
● Congenital
errors of metabolism
● Congenital storage disorders
Stages of Bone Marrow Transplant
There are four main stages of a bone marrow transplant:
1. Physical Evaluation
Regular diagnostic procedures are carried out, including full hemograms, X-rays, and urinalysis. Blood grouping and HLA (Human Leukocyte Antigen) typing are also carried out to assess donor and recipient compatibility. To lower the chance of transplant rejection, this compatibility assessment is absolutely essential.
2. Harvesting Cells from the Donor: This could be autologous or allogenic bone marrow transplant.
Autologous
Bone Marrow Transplant: The patient is the lone donor in this type of
transplant. After a comprehensive course of treatment, frozen stem cells are
removed from the patient by bone marrow extraction or apheresis (a procedure to
collect peripheral blood stem cells).
Allogeneic Bone Marrow Transplant: In
an allogeneic bone marrow transplant, the donor and recipient both have the
same HLA genotype. A genetically compatible donor, often a sibling or brother,
is used to get stem cells either by bone marrow extraction or apheresis.
3.
Conditioning: The
conditioning process helps to kill any cancer cells in the patient's body and
make room for the transplanted stem cells. This is done through chemotherapy
and/or radiation therapy.
4. Transplantation: In this stage, the stem cells are transplanted into the patient's body, either through an intravenous infusion or by injection into the bone marrow itself.
5. Recovery: The final stage of recovery can take months or even years. During this time, patients will be closely monitored for any signs of rejection or Graft-versus-Host Disease (GVHD).
Conclusion

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