Topic: AS04-MDS Biology and Pathogenesis/AS04f-Gene expression profiling: CHARACTERIZATION OF THE TRANSCRIPTIONAL ALTERATIONS OF PATIENTS WITH DEL(5Q) MYELODYSPLASTIC SYNDROME

Myelodysplastic syndrome (MDS) with deletion 5q [del(5q)] is a distinct clinical and pathologic disease subset that is exquisitely sensitive to lenalidomide for the treatment of red blood cell transfusion-dependent anemia. Lenalidomide resistance, including primary resistance, occurs by clonal evolution, which is frequently attributable to the presence of somatic mutations in the DNA-binding domain of the TP53 gene. The treatment options after development of resistance to lenalidomide are limited and consist of hypomethylating agents, clinical trials, and allogeneic hematopoietic stem cell transplantation. We discuss evidence-based strategies to devise a treatment algorithm for patients with MDS with del(5q).