65 MYELODYSPLASTIC SYNDROMES ARE CHARACTERIZED BY RECURRENT PATTERNS IN PATIENT-INDIVIDUAL MUTATIONAL HIERARCHIES THAT ARE SUBJECT TO HIGHLY DYNAMIC SUBCLONAL EVOLUTION DURING THERAPY AND DISEASE PROGRESSION. (April 2015) - Mossner, M.; Jann, J.C.; Wittig, J.; Nolte, F.; Fey, S.; Nowak, V.; Obländer, J.; Pressler, J.; Müdder, K.; Klein, C.; Zens, B.; Platzbecker, U.; et al.