Disease characterized by abnormalities in bone marrow, which produces more than the normal number of blood cells leading to thickening of blood and related complications.
It is not known the cause of the disease
In its early stages, symptoms may be minimal or not present at all.
In general clinical picture is vast but among the most common symptoms are found: vision problems, ringing in the ears and headaches.
Patients feel tired, weak, powerless.
There may also occur other signs and symptoms depending on each patient.
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