[Evaluation of the Clinical Efficacy and Prognosis of Long-Term Maintenance Lenalidomide Therapy in Patients with Multiple Myeloma].

The long-term maintenance lenalidomide treatment shows a good clinical effect on patients with MM, and MRD detection can assist the cilinical judge the prognosis of the patients. During maintenance treatment, the clinical symptoms, especially blood system damage of the patients should be take care, so as to avoid serious adverse reactions.