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Definition:

Paroxysmal cold hemoglobinuria (PCH) is a rare blood disorder in which the body's immune system produced antibodies that destroy red blood cells when they go from cold to warm temperatures.



Alternative Names:

PCH



Causes, incidence, and risk factors:

Paroxysmal cold hemoglobinuria only occurs in the cold, and affects mainly the hands and feet. Antibodies attach (bind) to red blood cells and to proteins in the blood (called complements). These antibodies destroy the red blood cells as they they move through the body and get rewarmed. As the cells are destroyed, hemoglobin, the part of red blood cells that carries oxygen, is released into the blood and passed in the urine.

PCH has been linked to secondary syphilis , tertiary syphilis , and other viral or bacterial infections. Sometimes the cause is unknown.

The disorder is rare.



Symptoms:

Signs and tests:

Laboratory tests can help diagnose this condition.

  • Bilirubin and "bad" cholesterol (LDL) levels are high.
  • Complete blood count (CBC) shows anemia.
  • Coombs test is negative.
  • Donath-Landsteiner test is positive.
  • Level of hemoglobin in the blood is increased during attacks.


Treatment:

Treating the underlying condition can help. For example, if PCH is caused by syphilis, symptoms may get better when the syphilis is treated.

In some cases, medicines that suppress the immune system are used.



Support Groups:



Expectations (prognosis):

Persons with this disease often get better quickly and do not have symptoms between episodes. Usually, the attacks end as soon as the damaged cells stop moving through the body.



Complications:
  • Continued attacks
  • Kidney failure
  • Severe anemia


Calling your health care provider:

Call your health care provider if you have symptoms of this disorder. The doctor can rule out other causes of the symptoms and decide whether you need treatment.



Prevention:

Persons who have been diagnosed with this disease can prevent future attacks by staying out of the cold.



References:

Schwartz RS. Autoimmune and intravascular hemolytic anemias. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 164.




Review Date: 11/10/2008
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and James R. Mason, MD, Oncologist, Director, Blood and Marrow Transplantation Program and Stem Cell Processing Lab, Scripps Clinic, Torrey Pines, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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Wentworth-Douglass Hospital
789 Central Avenue, Dover, NH 03820
Phone: (603) 742-5252
Toll free: 1 (877) 201-7100