Myelodysplastic Syndromes

Myelodysplastic syndromes (MDS) are a group of diseases which disrupt the production of blood cells by the bone marrow. There are several types of MDS. Low-risk MDS usually progresses slowly and causes mild to moderate anemia. High-risk MDS may cause more severe problems.

The vast majority of MDS cases belong to the primary, or de novo, MDS category. Less than 10% of cases belong to the secondary category, which follows exposure to toxins/chemical agents such as benzene, chemotherapy, radiation therapy, etc.