Chapter 30

Paroxysmal Nocturnal Hemoglobinuria (PNH) Analysis

Stephen J. Richards PhD, FRCPath

Stephen J. Richards PhD, FRCPath

Department of Haematology, St James's Institute of Oncology, Leeds Teaching Hospitals NHS Trust, Leeds, UK

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First published: 10 April 2012

Summary

Paroxysmal nocturnal hemoglobinuria (PNH) is a rare acquired hematopoietic stem cell disorder closely related to aplastic anemia. Its main clinical manifestations are hemolytic anemia, bone marrow failure, and life-threatening thrombosis. Rapid diagnosis is essential and flow cytometry plays a prominent role in the laboratory investigation of PNH. The availability of a rapid diagnostic test means that for patients with suspected PNH, a definitive diagnosis can be rapidly established by demonstrating the absence of cell membrane glycosylphosphatidylinositol (GPI)-anchored proteins from granulocytes and/or erythrocytes. With the successful development and clinical trial of a complement inhibition-based monoclonal antibody therapy (eculizumab) for PNH, accurate and timely diagnosis can have a considerable impact on patient management and outcome.

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