polycythemia vera, a rare slow-growing blood cancer with an increase in the number of red blood cells

3d smear red polycythemia oncology oncological medicine medical marrow cancer malignant malignancy illustration histopathology histopathological unhealthy hematology health care erythrocyte disorder disease diagnostic diagnosis condition cells cell cancerous bone blood abnormal hematological vera jak2 gene mutation autosomal recessive genetic erythropoietin