Senior Consultant, BMT, Haematology & Paediatric Haemato-Oncology, Artemis Hospitals, Gurugram
Part 9 of 11 in Diagnosis and Management of Sickle Cell Disease
Bone Marrow Transplant Complications and Post-Transplant Monitoring
November 9, 2025
The two most significant complications after a sickle cell bone marrow transplant are infection and graft-versus-host disease (GVHD), both of which become more likely with a half-match or unrelated donor than with a full-match sibling. Infection risk shifts predictably over time: bacterial infections dominate early after transplant, atypical bacterial and viral infections become more common later during engraftment, and once GVHD develops beyond 100 days, encapsulated organisms become a concern too, which is why patients receive prophylactic antibiotics, antifungals and antivirals on a set schedule.
Understanding graft-versus-host disease
GVHD occurs when donor T-cells recognise the patient's own tissue as foreign and attack it. Acute GVHD typically involves the skin, liver and gastrointestinal tract, with a pathology closer to an acute hypersensitivity reaction, while chronic GVHD more often involves the skin, eyes, oral cavity, liver, lungs and musculoskeletal system, driven more by tissue fibrosis. Preventive medication is given routinely, with close monitoring for early signs.
Why follow-up in the home country is decisive
In Dr. Gupta's own transplant programme, around 80% of full-match transplants and 60% of half-match transplants have survived well, with chronic GVHD and disease relapse identified as the leading causes among the non-survivors, and both are largely preventable with properly followed medication after the patient returns home. Twice-monthly visits are recommended in the early months, moving to monthly visits for at least a year, and she keeps in regular WhatsApp contact with patients and their local doctors specifically to catch problems early. Her most recent year of haplo-identical transplant outcomes reached 80% survival, a marked improvement she attributes directly to better-coordinated follow-up with doctor partners in patients' home countries.
This article is based on a Jivo Masterclass session conducted by Dr. Sukriti Gupta, Senior Consultant, BMT, Haematology and Paediatric Haemato-Oncology, Artemis Hospitals, Gurugram. The article has been summarised with the assistance of an AI tool from the original masterclass recording. Watch the full Masterclass recording
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This guide is based on a live Jivo Masterclass — Dr. Sukriti Gupta taught doctors across Africa on November 9, 2025.
FROM THE LIVE Q&A
Host (Varun, Jivo Healthcare)
Are biological parents automatically half-match donors, and what are the realistic chances of finding a match within the immediate family?
Dr. Sukriti Gupta
Parents are usually a half match by default, provided they are not sicklers themselves and have no disqualifying condition such as HIV or organ damage. A full-match sibling occurs in about 25% of cases, and a half-matched sibling is actually a better donor than a half-matched parent, since sibling cells are better tolerated with fewer pre-existing antibody reactions. Beyond parents and siblings, more distant relatives such as aunts, uncles or cousins are rarely even a half match, so realistic donor availability is mostly limited to the immediate family.
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Frequently Asked Questions
Can adults present with dactylitis?▼
Dactylitis, swelling of the fingers from small vessel blockage in the hands, is more commonly seen in children because they have not yet developed collateral blood vessels the way adults have. In adults, the vessels involved are relatively larger and better able to develop collaterals, so dactylitis is much less common in that age group.
For a positive diagnosis, is the hemoglobin S level the same across all countries?▼
Patients carrying both sickle cell genes typically have a haemoglobin S level above 60%, and below that the manifestations are usually milder, seen more in sickle cell trait or a combination haemoglobinopathy such as HbSC or HbSE. There is a general tendency for higher HbS to mean more symptoms, but the correlation is not exact and cannot be relied on mathematically for any individual patient.
What types of stroke are sickle cell patients most likely to suffer from, and how can it be prevented?▼
The middle and posterior cerebral artery territories are affected most commonly, similar to the pattern seen in adults, though the anterior territory can occasionally be involved too. Regular transcranial Doppler screening from two years of age is the key prevention tool: it uses ultrasound to measure blood flow velocity in the cerebral vessels and identifies children at higher risk of stroke early, so that preventive medication and closer monitoring can begin before a stroke actually happens.
What is your comment on the use of hydroxyurea in pregnancy, and what are the alternative options?▼
In pregnant women who have generally done well and had infrequent pain crises up to childbearing age, hydroxyurea is usually held during pregnancy since it is not a good option for fetal development. Good hydration and avoiding any other stressful conditions are advised instead, and folic acid supplementation must continue.
At what age do we commence hydroxyurea?▼
As early as the disease is detected, sometimes as young as two months of age.
What are the two most significant complications after a sickle cell bone marrow transplant?▼
Infection and graft-versus-host disease (GVHD), both of which become more likely with a half-match or unrelated donor compared with a full-match sibling transplant.
Why is post-transplant follow-up in the patient's home country so important?▼
Chronic GVHD and disease relapse, the leading causes of poor outcomes after otherwise successful transplants, are largely preventable with properly followed medication and monitoring after the patient returns home, which is why regular contact between the transplant centre and the patient's local doctor matters.
In This Series: Diagnosis and Management of Sickle Cell Disease
- 1.Diagnosis and Management of Sickle Cell Disease
- 2.Understanding Sickle Cell Disease: Genetics and Pathophysiology
- 3.Recognizing the Symptoms and Complications of Sickle Cell Disease
- 4.Stroke Risk and Screening in Sickle Cell Disease
- 5.Diagnosing Sickle Cell Disease: Screening and Prenatal Testing
- 6.Supportive Care and Pharmacological Treatment for Sickle Cell Disease
- 7.Bone Marrow Transplant for Sickle Cell Disease: Indications and Process
- 8.Finding a Donor Match for Bone Marrow Transplant in Sickle Cell Disease
- 9.Bone Marrow Transplant Complications and Post-Transplant Monitoring
- 10.Gene Therapy for Sickle Cell Disease: CRISPR Editing and Gene Addition
- 11.Sickle Cell Disease in Pregnancy