Prussian blue stain

Ring sideroblasts: abnormal deposition of iron in the mitochondria of red cell precursors forming a ring around the nucleus (several ring sideroblasts indicated by red arrows).
Case Discussion
- Author: Paulo Henrique Orlandi Mourao; zooming in and minor modification by Mikael Häggström.
- Original file: http://commons.wikimedia.org/wiki/Category:Sideroblastic_anemia#/media/File:Ring_Sideroblast_smear_2010-01-13.JPG
- Modifications: red arrow annotations
- License: CC BY-SA 3.0