Myelodysplastic Syndromes

Myelodysplastic Syndromes is indexed under Hematologic, Bone Marrow Failure. Also known as MDS, preleukemia.

US prevalence

~60,000-170,000; ~10,000-20,000 new cases/year Source: MDS Foundation; SEER. Cites federal and non-federal sources, and the record does not say which one gave this figure. Label: REPORTED.

ICD-10-CM codes

D46, D46.9

Typical onset

Median age ~70; rare <50

Course

progressive

Body systems

hematologic

Sex differences

M:F ~1.5-2:1

Racial and ethnic differences

Limited data; may be underdiagnosed in minorities

What this page does not establish

These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.

Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.

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