49 THE PROGNOSTIC SIGNIFICANCE OF TP53 MUTATIONS IN MDS PATIENTS WITH DEL(5Q). (April 2015) - Belickova, M.; Vesela, J.; Jonasova, A.; Planetova, B.; Valka, J.; Mikulenkova, D.; Zemanova, Z.; Brezinova, J.; Michalova, K.; Cermak, J.