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Secondary polycythemia is the most common cause of polycythemia. It occurs in reaction to chronically low oxygen levels , medications, other genetic mutations that impact the body's ability to transport or detect oxygen, or, rarely because of certain cancers.
In oncology, polycythemia vera (PV) is an uncommon myeloproliferative neoplasm in which the bone marrow makes too many red blood cells. [1] The majority of cases [ 2 ] are caused by mutations in the JAK2 gene, most commonly resulting in a single amino acid change in its protein product from valine to phenylalanine at position 617.
High platelet counts can occur in patients with polycythemia vera (high red blood cell counts), and is an additional risk factor for complications. [citation needed] A very small number of people report symptoms of erythromelalgia, a burning sensation and redness of the extremities that resolves with cooling, or aspirin or both. [3]
Hyperviscosity syndrome is a group of symptoms triggered by an increase in the viscosity of the blood.Symptoms of high blood viscosity include spontaneous bleeding from mucous membranes, visual disturbances due to retinopathy, and neurologic symptoms ranging from headache and vertigo to seizures and coma.
The excessive fluid is usually blood, and can be a sign of a number of conditions with different causes. An excess of blood may be either an excessive blood flow to an area of the body, or an increase in the volume of blood (polycythemia). Extra perfusion to the face is termed facial plethora, a hallmark sign of Cushing's syndrome. [1]
A warning has been issued to travelers over the spread of three diseases, including the Marburg virus. It’s a close cousin of Ebola that’s been dubbed the “bleeding eye” virus due to one ...
Older adults with calcium and magnesium deficiencies also had poorer cognitive performance compared to peers with adequate micronutrient levels, a recent study has found.
Similarly, myeloproliferative disorders, in which the bone marrow produces too many blood cells, predispose to thrombosis, particularly in polycythemia vera (excess red blood cells) and essential thrombocytosis (excess platelets). Again, these conditions usually warrant specific treatment when identified. [21]
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