Ring sideroblasts, with iron laden occurs in

i.e. (Mitochondria) : (301-Harsh Mohan 6th ) (625-Robbins & Cotran-Pathologic basis of disease 8th)Ringed sideroblasts is characteristic of sideroblastic anemia /Myelodysplastic SyndromeRinged sideroblast in which haem synthesis is disturbed as occurs in sideroblastic anaemiasRinged sideroblasts containing numerous large granules, often forming a complete or partial ring around the nucleus. These ringed arrangement of these granules is due to presence of iron laden mitochondria around the nucleus