Scientists may be on the road to solving the mystery of a group of mostly incurable blood diseases called myelodysplastic syndromes (MDS), which cause people to have immature, malfunctioning bone marrow cells that fuel a diverse set of health problems and can lead to leukemia. Researchers report in the journal Cancer Discovery identifying a gene that in laboratory experiments fuels the biological processes that cause the different types of MDS that physicians see in patients.