/Adverse Drug Reactions(ADRs), Serious Adverse Events(SAEs)/Serious Adverse Drug Reactions(SADRs), unexpected AE/ADR and unexpected SAE/SADR, and to scrutinize factors influencing safety & efficacy of the drug. It is necessary to examine patients' demographics and baseline characteristics, medical history, status of VIDAZA treatment, concomitant medication and evaluation of safety and final efficacy (best response) assessment.