*'''Myelophthisis''', the displacement of the normal cell lines of the bone marrow by another cell or tissue type may also reduce the function of the megakaryocytes. Possible diseases in this category include '''myelofibrosis''' and '''immunoproliferative''' or '''myeloproliferative''' neoplastic disease. | *'''Myelophthisis''', the displacement of the normal cell lines of the bone marrow by another cell or tissue type may also reduce the function of the megakaryocytes. Possible diseases in this category include '''myelofibrosis''' and '''immunoproliferative''' or '''myeloproliferative''' neoplastic disease. |