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Types of Blood Disorders

 Blood disorders can affect any of the three main components of blood:

  • Red blood cells, which carry oxygen to the body's tissues
  • White blood cells, which fight infections
  • Platelets, which help blood to clot

Blood disorders can also affect the liquid portion of blood, called plasma.

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Myelodysplastic syndrome (MDS) is a condition that affects the bone marrow and the blood cells it produces. Your bone marrow makes different types of blood cells: Red blood cells, which carry oxygen in your blood. White blood cells of different types, which are important elements of your immune system. Platelets, which help your blood to clot. Your bone marrow needs to produce the proper number of these cells. And the cells need to have the right shape and function. In people with...

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Treatments and prognosis for blood diseases vary, depending on the blood condition and its severity.

Blood Disorders Affecting Red Blood Cells

Blood disorders that affect red blood cells include:

Anemia : People with anemia have a low number of red blood cells. Mild anemia often causes no symptoms. More severe anemia can cause fatigue, pale skin, and shortness of breath with exertion.

Iron-deficiency anemia: Iron is necessary for the body to make red blood cells. Low iron intake and loss of blood due to menstruation are the most common causes of iron-deficiency anemia. It may also be caused by blood loss from the GI tract because of ulcers or cancer. Treatment includes iron pills, or rarely, blood transfusion.

Anemia of chronic disease: People with chronic kidney disease or other chronic diseases tend to develop anemia. Anemia of chronic disease does not usually require treatment. Injections of a synthetic hormone, epoetin alfa (Epogen or Procrit), to stimulate the production of blood cells or blood transfusions may be necessary in some people with this form of anemia.

Pernicious anemia (B12 deficiency): A condition that prevents the body from absorbing enough B12 in the diet. This can be caused by a weakened stomach lining or an autoimmune condition. Besides anemia, nerve damage (neuropathy) can eventually result. High doses of B12 prevent long-term problems.

Aplastic anemia: In people with aplastic anemia, the bone marrow does not produce enough blood cells, including red blood cells. A viral infection, drug side effect, or an autoimmune condition can cause aplastic anemia. Medications, blood transfusions, and even a bone marrow transplant, may be required to treat aplastic anemia.

Autoimmune hemolytic anemia: In people with this condition, an overactive immune system destroys the body's own red blood cells, causing anemia. Medicines that suppress the immune system, such as prednisone, may be required to stop the process.

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