Bone marrow aspirate from an eight year old Belgian Mallinois with sideroblastic anemia due to vitamin B6 deficiency (same case as previous image): A group of immature nucleated erythroid cells includes a ringed sideroblast (containing >4 blue iron-containing granules and encompassing more than a third of the nuclear circumference, arrow) is present adjacent to another non-ringed sideroblast (lower cell) and non-iron containing erythroid precursor (cell to right). There are also numerous siderocytes (blue-staining iron inclusions in mature red blood cells), Prussian blue stain, 100x objective
