The role of flow cytometry in the diagnosis of paroxysmal nocturnal hemoglobinuria in the clinical laboratory.
Paroxysmal nocturnal hemoglobinuria (PNH) is a rare acquired hematopoietic stem cell disorder closely related to aplastic anemia. Hemolytic anemia and life-threatening thromboses are common features in many patients. Rapid diagnosis is highly desirable and flow cytometry plays a key role in the laboratory investigation of PNH. By demonstrating absence of cell membrane glycosylphosphatidylinositol-anchored proteins from granulocytes or red cells, a definitive diagnosis of PNH can be established. This can have a considerable impact on patient management and outcome. As with all rare diseases, internal and external quality assurance is essential for good laboratory practice and to fulfill the requirements of national laboratory accreditation schemes.
Department of Haematology, Haematological Malignancy Diagnostic Service, The Algernon Firth Building, Leeds General Infirmary, Leeds LS1 3EX, United Kingdom. stephen.richards2@nhs.net
Stephen J
SJ
Richards
David
D
Barnett
D005434:Flow Cytometry / Q000379:methods*; D006457:Hemoglobinuria, Paroxysmal / Q000175:diagnosis* / Q000276:immunology; D006801:Humans; D016130:Immunophenotyping