- Both are very rare
- Usually microcytic, maybe normocytic / macrocytic
- Acquired: idiopathic, alcohol / drug-induced (INH, linezolid), low copper
- Ringed sideroblasts seen on peripheral smear
- ↑ Ferriten
- ↑ Transferrin Saturation %
- Usually ↑ RDW (due to many cell types)
See posting Anemia – 2.