Factor XII (Hageman factor) deficiency

Table of Contents

Symptoms

There are usually no symptoms.


Signs and tests

Factor XII deficiency is usually found when clotting tests are done for routine screening.

Tests may include:

  • Factor XII assay
  • Partial thromboplastin time (PTT)


Review Date: 02/28/2011
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)