bone marrow morphology in 39 symptomatic patients with myeloproliferative disorders ( polycythaemia vera 15 , essential thrombocythaemia 14 , idiopathic myelofibrosis 9 , myeloproliferative syndrome 1 ) and elevated platelet counts was studied before and after a median of 18 months of continuous treatment with hydroxyurea .
C0005953
bone marrow
C0040028
essential thrombocythaemia