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Polycythemia is defined as serum hematocrit (Hct) or hemoglobin (HgB) exceeding normal ranges expected for age and sex, typically Hct >49% in healthy adult men and >48% in women, or HgB >16.5 g/dL in men or >16.0 g/dL in women. [8] The definition is different for neonates and varies by age in children. [9] [10]
One study found the median age at diagnosis to be 60 years, [9] while a Mayo Clinic study in Olmsted County, Minnesota found that the highest incidence was in people aged 70–79 years. [40] The overall incidence in the Minnesota population was 1.9 per 100,000 person-years, and the disease was more common in men than women. [ 40 ]
Hematocrit levels that are too high ... The normal hematocrit level is around 40% for adult women and about 45% for adult men. In newborns, it is approximately 55% ...
hemoconcentration (elevated hematocrit and hemoglobin readings, with hematocrit levels >49% in men and >43% in women, not because of an absolute increase in them but because of the leak of plasma); very low blood pressure (profound arterial hypotension, with systolic blood pressure levels <90 mm Hg);
According to the World Health Organization, a hemoglobin concentration below 110 g/L for children under 5 years of age and pregnant women, and below 130 g/L for men indicates anemia. Hemoglobin is a blood protein that transports oxygen to the cells of the body.
In adults, absolute lymphocytosis is present when the lymphocyte count is greater than 5000 per microliter (5.0 x 10 9 /L), in older children greater than 7000 per microliter and in infants greater than 9000 per microliter. [1] Lymphocytes normally represent 20% to 40% of circulating white blood cells. When the percentage of lymphocytes exceeds ...
[15] [16] [17] Patients are usually designated as having a low or high risk of bleeding or developing blood clots based on their age, medical history, blood counts and their lifestyles. Low risk individuals are usually treated with aspirin , whereas those at high risk are treated with hydroxycarbamide , interferon-α or anagrelide ).
Basophilia is the condition of having greater than 200 basophils/μL in the venous blood. [1] Basophils are the least numerous of the myelogenous cells, and it is rare for their numbers to be abnormally high without changes to other blood components.