What is the definition of polyccythemia?

Answer 1

Polycythemia is a condition characterized by an increased concentration of red blood cells in the bloodstream, leading to elevated hemoglobin and hematocrit levels. This can result from various factors, including primary causes like polycythemia vera, a bone marrow disorder, or secondary causes such as chronic hypoxia or tumors producing erythropoietin. Symptoms may include headaches, dizziness, and an increased risk of thrombosis. Diagnosis typically involves blood tests and may require further evaluation to determine the underlying cause.