Helpful information to the diagnosis of polycythaemia True polycythaemia must be distinguished from other notable causes of an increased haemoglobin concentration. What exams are useful in the diagnosis and initial assessment? True polycythaemia is definitely a myeloproliferative disorder that should be distinguished from other causes of an increased haemoglobin level. Remember that such findings might be normal in young males. A high haemoglobin level is even more essential if intercurrent vascular disease exists because polycythaemia vera is definitely a risk factor for both arterial and venous thrombosis.The analysis was conducted between October 18, 2010 , july 31 and, 2014 , at 120 centers in 14 countries . The trial protocol was created by the authors and the sponsors . The institutional review panel at each middle approved the analysis protocol. The monitoring and assortment of the data had been performed or overseen by the sponsors. The info were collected in digital case-report forms, which were retained by the sponsors, with copies delivered to the principal investigator at each site.