Mr Spielman attends to discuss his emergency admission to hospital last week where he was unfortunately diagnosed with a Deep Vein Thrombosis. He is 61, an ex smoker and usually fit and well. His admission was prolonged as he reports he had further testing and assessment by the haematology team as he was also diagnosed with a condition called Polycythaemia Rubra Vera (PRV). He does not know much about this and attends to discuss this in depth.
Which one of the following statements is correct?