NCI Definition: A myelodysplastic syndrome defined by 5-9% blasts in the bone marrow, and <5% blasts in the blood. Approximately 25% of cases progress to an acute leukemia. (WHO) [1]

Disease Details

MDS with Excess Blasts-1, MDS-EB-1, Myelodysplastic Syndrome with Excess Blasts-1, RAEB-1, RAEB-I
Refractory Anemia with Excess Blasts
OncoTree Name
MDS with Excess Blasts-1
OncoTree Code


1. National Cancer Institute. NCI Thesaurus Version 18.11d. https://ncit.nci.nih.gov/ncitbrowser/ [2018-08-28]. [2018-09-21].

2. The AACR Project GENIE Consortium. AACR Project GENIE: powering precision medicine through an international consortium. Cancer Discovery. 2017;7(8):818-831. Dataset Version 4. This dataset does not represent the totality of the genetic landscape; see paper for more information.

3. All assertions and clinical trial landscape data are curated from primary sources. You can read more about the curation process here.