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Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload
Published on: March 14, 2017
Unusual splenic sinusoidal iron overload in sickle cell/haemoglobin D-Punjab disease
P M C Jiskoot1, C Halsey, R Rivers
1Department of Histopathology, St Mary's Hospital, Praed Street, London W2 1NY, UK.
Insights
Sickle cell/haemoglobin D-Punjab disease, similar to sickle cell anaemia, presents unique iron loading patterns in spleen tissue. This case highlights potential endothelial iron uptake mechanisms in patients undergoing transfusions.
Area of Science:
- Hematology
- Pathology
- Genetics
Background:
- Sickle cell/haemoglobin D-Punjab disease shares clinical similarities with sickle cell anaemia.
- Management often involves regular blood transfusions to manage symptoms.
Observation:
- An 11-year-old boy with sickle cell/haemoglobin D-Punjab disease received transfusions since infancy.
- Splenectomy at age 10 revealed significant iron deposition in splenic sinusoidal endothelial cells, not primarily macrophages.
Findings:
- Histology showed heavy sinusoidal endothelial iron loading, suggesting unusual iron sequestration.
- Potential mechanisms include endothelial phagocytosis of sickled red blood cells or direct iron uptake via transferrin receptors.
Implications:
- Understanding iron distribution is crucial for managing transfusion-dependent hemoglobinopathies.
- Monitoring for and mitigating iron overload is essential in long-term transfusion therapy.
Abstract:
Sickle cell/haemoglobin D-Punjab disease is a disorder with similar clinical features to sickle cell anaemia. This report describes the case of an 11 year old boy with this disease who was treated with regular transfusions from infancy. He underwent splenectomy at the age of 10 years for hypersplenism. Histology of the spleen revealed a striking pattern of heavy sinusoidal endothelial iron loading, with only moderate uptake by macrophages. Possible explanations for this unusual distribution of iron include phagocytosis of sickled erythrocytes by sinusoidal endothelial cells or direct endothelial iron uptake via transferrin receptors. Transfusion programmes ameliorate the symptoms of sickle cell disease but the dangers of iron overload should always be remembered.
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