Age: infant

Cause:

1. inadequate iron stores at birth
2. deficient iron in diet
3. impaired gastrointestinal absorption of iron
4. excessive iron demands from blood loss
5. polycythemia vera
6. cyanotic CHD

• widening of diploe + thinning of tables with sparing of occiput (no red marrow)
• hair-on-end appearance of skull
• osteoporosis in long bones (most prominent in hands)
• absence of facial bone involvement