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You are here : AllRefer.com > Health > Tests & Exams > CBC: What do Abnormal Results Mean?

CBC

Provided by A.D.A.M.

Definition

Why is the Test Performed?

How is the Test Performed?

How to Prepare for the Test?

How will the Test Feel?

Normal Values

What do Abnormal Results Mean?

Special Considerations

Risks

Pictures & Images

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Alternate Names : Complete Blood Count

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What do Abnormal Results Mean?

High numbers of RBCs may indicate:

Low numbers of RBCs may indicate: Low numbers of WBCs (leukopenia) may indicate:
  • Bone marrow failure (for example, due to infection, tumor or fibrosis)
  • Presence of cytotoxic substance
  • Autoimmune/collagen-vascular diseases (such as lupus erythematosus)
  • Disease of the liver or spleen
  • Radiation exposure
High numbers of WBCs (leukocytosis) may indicate: Low hematocrit may indicate:
  • Anemia (various types)
  • Blood loss (hemorrhage)
  • Bone marrow failure (for example, due to radiation, toxin, fibrosis, tumor)
  • Hemolysis (RBC destruction) related to transfusion reaction
  • Leukemia
  • Malnutrition or specific nutritional deficiency
  • Multiple myeloma
  • Rheumatoid arthritis
High hematocrit may indicate:
  • Dehydration
    • Burns
    • Diarrhea
  • Polycythemia vera
  • Low oxygen tension (smoking, congenital heart disease, living at high altitudes)
Low hemoglobin values may indicate:
  • Anemia (various types)
  • Blood loss
The test may be performed under many different conditions and in the assessment of many different diseases.

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Definition
Why is the Test Performed?
How is the Test Performed?
How to Prepare for the Test?
How will the Test Feel?
Normal Values
What do Abnormal Results Mean?
Special Considerations
Risks
Pictures & Images

Review Date : 11/8/2002
Reviewed By : Michael C. Milone, M.D., Ph.D., Department of Pathology and Laboratory Medicine, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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