in a multicenter study by the groupe francais de cytogenetique hematologique , chromosome investigation was undertaken in 55 cases of acutely transformed philadelphia-negative chronic myeloproliferative syndromes ( polycythemia vera , 34 cases ; essential thrombocythemia , two cases ; myelofibrosis with myeloid metaplasia of the spleen , 12 cases ; other , unclassified myeloproliferative disorders , seven cases ) .
C0001815
myelofibrosis with myeloid
C0027022
myeloproliferative