Bone marrow transplantation (BMT) is a highly complex, high-tech intervention used in modern hematology and oncology. This treatment method aims to restore a patient's damaged hematopoietic system using healthy stem cells. Although alternative approaches such as targeted therapy, immunomodulators, or the use of purine analogs are constantly evolving in medical practice [3], BMT often remains the only radical chance for recovery in severe blood diseases.
Primary Indications for Bone Marrow Transplantation
Indications for BMT cover a wide spectrum of malignant and benign blood system pathologies, as well as certain genetic disorders and severe immunodeficiencies. The main goal of the procedure is to replace diseased, tumor, or defective bone marrow cells with healthy donor or the patient's own preserved cells.
- Acute and chronic leukemias, when standard chemotherapy does not guarantee sustained remission.
- Severe forms of aplastic anemia and other bone marrow failure syndromes.
- Multiple myeloma and various types of lymphomas.
- Hereditary metabolic disorders and primary immunodeficiency states in children.
Types of Transplantation and Donor Selection
Depending on the source of stem cells and genetic compatibility, there are several main varieties of the procedure. Autologous transplantation involves using the patient's own stem cells, which are collected and frozen in advance before aggressive chemotherapy courses. Allogeneic transplantation involves the transplantation of cells from a compatible donor — a relative or an unrelated volunteer from an international registry.
Just as in neurology and other disciplines where physicians strictly weigh the risks of concomitant therapy and complications (for example, the prevention of graft-versus-host disease or metabolic disorders during strict diets [3, 6]), hematologists carefully evaluate the recipient's immunological status. Donor selection requires detailed HLA typing to minimize the risk of graft rejection.
Stages of Preparation for the Procedure
The preparatory stage, or conditioning, plays a key role in the success of the entire procedure. It pursues two main objectives: the destruction of remaining tumor cells in the body and the suppression of the patient's own immune system to prevent rejection of the donor material.
- Comprehensive examination: assessment of cardiovascular, respiratory, and excretory system functions to rule out contraindications.
- Conditioning regimen: administration of high doses of chemotherapy drugs combined with or without radiation therapy.
- Sanitation of infection foci: complete oral cavity sanitation and treatment of chronic inflammatory processes, as the patient's immunity will be temporarily completely suppressed.
Postoperative Period and Risks
Immediately after the infusion of stem cells, a critical period of aplasia begins, when blood counts drop to minimum values. The patient requires strict sterile isolation, the administration of potent antibacterial, antifungal, and antiviral drugs, as well as regular transfusions of blood components. As modern clinical studies in related fields of intensive care show, strict control of homeostasis, water-electrolyte balance, and the prevention of infectious complications directly affect survival and the success of rehabilitation [2, 7].
Sources
- [1] Low-dose temozolomide combined with valproic acid in the treatment of an elderly patient with MGMT-methylated glioblastoma and multiple comorbidities: a case report. - PubMed
- [2] Serum Potassium and Mineralocorticoid Receptor Antagonists As Modifiers of Atrial Arrhythmia Recurrence After Catheter Ablation for Atrial Fibrillation. - PubMed
- [3] Transfusion-Associated Graft-Versus-Host Disease Risk and Transfusion Requirements After Cladribine in Multiple Sclerosis. - PubMed
- [4] Disease-modifying treatment preferences and decision-making in a multiple sclerosis randomized and observational clinical trial (DELIVER-MS). - PubMed
- [5] WATER II (80-150 mL) procedural outcomes. - PubMed
- [6] Corpus Callosotomy in LIS1 Lissencephaly: Postoperative Ketogenic Diet-Related Metabolic Derangements and Feeding Intolerance. - PubMed
- [7] Plasma and Platelet Transfusion Strategies in Critically Ill Children Following Severe Trauma. - PubMed
- [8] Development and validation of an explainable prediction model for post-stroke epilepsy in patients with ischaemic stroke following mechanical thrombectomy. - PubMed
Disclaimer: The information provided in this article is for reference purposes only and does not replace an in-person consultation with a hematologist.