<prompt> All are TRUE about the clinical features of polycythemia rubra vera, EXCEPT:Hepatomegaly is the initial presenting signAquagenic pruritus presentVeigo, tinnitus, headache and visual disturbances are due to hyperviscositySystolic hypeension is a feature of increased red cell mass  <response>: Polycythemia rubra vera clinical features: Splenomegaly may be the initial presenting sign Aquagenic pruritus Hyperviscosity leads to veigo, tinnitus, headache, visual disturbances, and transient ischemic attacks TIAs. Systolic hypeension is due to red cell mass elevation. Venous or aerial thrombosis may be the presenting manifestation of PV. Erythromelalgia, is a complication of the thrombocytosis Hyperuricemia with secondary gout, uric acid stones, and symptoms due to hypermetabolism can also complicate the disorder. Ref: Harrison, E-18, P-899 