Relacionar Columnas polycythemia veraVersión en línea information about thus blood cancer por Kennedy Ellis 1 enlarged spleen 2 the mutation in which gene causes this blood cancer 3 what does polycythemia cause? 4 polycythemai vera 5 what do you experience? 6 drawing blood increased number of red blood cells janus kinase 2 (JAK2) helps fight infection and filter unwanted material and gets bigger when there is too much RBCs helps reduce # of RBCs heart attack or stroke itchiness, headches, dizziness, bleeding/bruising, weakness, fatigue