Ringed Sideroblasts are seen in -
Sideroblastic anemia can be hereditary (due to decreased ALA synthase activity) or acquired (secondary to leukemias, myelodysplastic syndrome, alcoholism, copper deficiency, pyridoxine deficiency or lead poisoning).
Iron deficiency anemia
Myelodysplastic syndrone
Thalassemia
Anemia of chronic disease