_:vb50953516 "url:http://en.wikipedia.org/wiki/Myelofibrosis"^^ . _:vb50953516 . _:vb50953516 "A myeloid neoplasm that is located in the bone marrow which results in bone marrow being replaced by fibrous (scar) tissue."^^ . _:vb50953516 . _:vb50953516 . _:vb50953516 . _:vb50953516 .