Table 1.

Histological grading of iron storage[2]

Grade	Ease of observation and magnification required
0	Granules absent or barely discernible at × 400
1	Granules barely discernible at × 250 and easily confirmed at × 250
2	Discrete granules resolved at × 100
3	Discrete granules resolved at × 25
4	Masses visible at × 10, or naked eye