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16. TYPICAL FORMS OF PATHOLOGY OF THE WHITE BLOOD CELL SYSTEM. LEUKOCYTOSIS AND LEUKOPENIA. LEUKEMOID REACTIONS

Questions to prepare for classes and examination

 The main stages of leukopoiesis and its regulation by humoral factors.

 Classification of disorders of white blood cells.

 Leukopenia: definition and causes.

 General mechanisms of leukopenia.

 Causes and mechanisms of a decreased leukocytes production.

 Causes and mechanisms of an increased peripheral destruction of leukocytes.

 Signs and consequenses of neutropenia.

 Leukocytosis: causes and mechanisms.

 Causes of increased production in the bone marrow, mobilization, and defective margination of neutrophils.

 Types of leukocytosis; patterns of shift to the left.

 Biological significance of leukocytosis.

 Types and mechanisms of abnormal neutrophil function.

 Leukemoid reactions: typical features, causes, mechanisms of development, physiological significance.

 Changes in the complete blood test with differential. Absolute and relative shifts in leukocytes count.

N 72

A 38-year-old male industrial worker visited his general practitioner. The patient was a victim of fire at his working place. During the accident he had received epidermal and partial thickness burns of the right side of the body (about 10% of the total body surface area). His condition was fair, the body temperature was 37.8 °C. On the fifth day the patient's condition deteriorated due to an intercurrent infection of the burnt wound. He developed signs of

marked purulent, exudative inflammation of the derma and subcutaneous tissue; his body temperature elevated to 40.2 °C. Blood tests were taken twice at different time points. The following results were obtained:

Analysis A

Analysis B

Hemoglobin

125 g/L

125 g/L

Erythrocytes

4.5Ч1012/L

4.7Ч1012/L

Reticulocytes

0.5%

0.8%

Leukocytes

10.5Ч109/L

16Ч109/L

Neutrophils

myelocyte

0

1%

metamyelocyte

0

4%

band

6%

14%

segmented

68%

60%

Eosinophils

2%

0

Basophils

0

0

Lymphocytes

21%

16%

Monocytes

3%

5%

Questions

 Evaluate the results of the tests A and B and make a conclusion to each of them. What is the difference between these two analyses?

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