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Ham test


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Alternative Names

Acid hemolysin test


Normal Values

A negative test is normal.


What abnormal results mean

Abnormal results may be due to:

  • Paroxysmal nocturnal hemoglobinuria
  • Congenital dyserythropoietic anemia


Review Date: 02/05/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).




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