However it can usually be kept under effective control by regular follow-up. There is a Leukaemia Research Fund booklet called Acute Myeloid Leukaemia which gives details of this condition. In others the overactive marrow seems to exhaust itself after many years and the condition converts to one called myelofibrosis in which scar tissue develops in the bone marrow. There is a Leukaemia Research Fund leaflet called Myelofibrosis which gives details of this condition. Never the less, polycythaemia vera can generally be considered a relatively benign disorder which frequently does not interfere significantly with the patient's activity or working life for a long time, if at all.
Prognosis See above.