Chapter 31

Acquired aplastic anaemia and paroxysmal nocturnal haemoglobinuria

Austin G Kulasekararaj

Austin G Kulasekararaj

King's College Hospital/King's College London, London, UK

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Neal S Young

Neal S Young

National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA

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Judith CW Marsh

Judith CW Marsh

King's College Hospital/King's College London, London, UK

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First published: 04 April 2025

Summary

Acquired aplastic anaemia (AA) is a rare immune mediated bone marrow failure characterised by hypocellular bone marrow and pancytopenia. It is a diagnosis of exclusion and is closely associated with disorders like paroxysmal nocturnal haemoglobinuria (PNH) and myelodysplastic syndrome. Good supportive with transfusion support and anti-infective prophylaxis is critical. The two main treatment options for aplastic anaemia (AA) are allogenic haemopoietic stem cell transplant or immunosuppressive therapy with horse anti-thymocyte globulin with cyclosporin and eltrombopag, based on disease severity, age, availability of HLA compatible sibling donor and comorbidities. Symptomatic PNH associated with haemolysis and/or thrombosis is managed with anti-complement therapy, which mainly targets the complement C5 protein and has led to marked improvement in prognosis.

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