Is a bone marrow necessary in patient with splenomegaly and polycythemia vera?   

Yes. Bone marrow is necessary in a patient with polycythemia vera and splenomegaly. There is a possibility of missing ET or associated primary or secondary myelofibrosis. The only way to distinguish between the three bcr-abl negative MPN namely MF, ET, and PV is by performing a bone marrow biopsy an...