<prompt> The following are the myeloproferative disorders except-Polycythemia veraEssential thrombocytosisChronic myeloid leukemiaHairy cell leukemia  <response>: Hairy cell leukemia is a B-cell malignancy characteised by the presence of hairy cells in the blood bone marrow splenomegaly. Myeloproliferative diseases include chronic myeloid leukaemia ,polycythaemia vera, essential thrombocythaemia,chronic idiopathic myelofibrosis,chronic neutrophilic leukaemia ,chronic eosinophilic leukaemia .Reference :Harsh mohan textbook of pathology 6th edition pg no 357 378. 