Short answer · Medically reviewed summary · Last updated: 2026-05-08
Myelodysplastic Syndromes (MDS) are a group of diverse bone marrow disorders characterized by the inefficient production of healthy blood cells. While "Myelodysplastic Syndromes" is the current clinical standard, you may encounter the older term "preleukemia" or "smoldering leukemia" in historical medical literature or older patient records. What are the common synonyms and historical names for Myelodysplastic Syndromes? In medical records, you may see Myelodysplastic Syndromes referred to by several names due to evolving diagnostic criteria.
Myelodysplastic Syndromes (MDS) are a group of diverse bone marrow disorders characterized by the inefficient production of healthy blood cells. While "Myelodysplastic Syndromes" is the current clinical standard, you may encounter the older term "preleukemia" or "smoldering leukemia" in historical medical literature or older patient records.
In medical records, you may see Myelodysplastic Syndromes referred to by several names due to evolving diagnostic criteria. Historically, these conditions were often grouped under the umbrella of "preleukemia" because of the risk of progression to acute myeloid leukemia (AML). Other outdated or descriptive terms include "refractory anemia with excess blasts" (RAEB) or "dysmyelopoietic syndrome." While these specific subtypes remain important for classification, the overarching term Myelodysplastic Syndromes is now the universally preferred nomenclature in clinical oncology.
Official medical classification systems use specific codes to track Myelodysplastic Syndromes for research and insurance purposes. Understanding these codes can help you navigate your own medical records:
The nomenclature for Myelodysplastic Syndromes has shifted as our understanding of bone marrow failure has advanced. In the past, classification was based primarily on how cells appeared under a microscope (morphology). Today, classification relies on a combination of morphology, cytogenetics (chromosomal changes), and molecular testing. This shift from descriptive historical names like "smoldering leukemia" to the more precise Myelodysplastic Syndromes allows physicians to better predict disease progression and select targeted therapies for the 36 members of the DiseaseMaps community currently navigating this diagnosis.
Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.