based on recent definitions , 49 patients were classified as myeloproliferative disorders ( mpd ) ( polycythemia vera , myelofibrosis , undifferentiated myeloproliferative disorder , essential thrombocythemia ) , and 58 as cytopenic states ( refractory anemia , pancytopenia ) .
C0001815
myelofibrosis
C0027022
myeloproliferative