Table 2.

- The average mean number of nucleolar organizer region/cell among different types of breast lesions.

Average mean number of NOR/cell	Fibroadenoma	Fibrocystic breast changes	Invasive ductal carcinoma	Total
≤2.0 NOR/cell	12 (40.0)	11 (36.7)	7 (23.3)	30 (100)
2.1-3.0 NOR/cell	20 (36.4)	5 (9.1)	30 (54.5)	55 (100)
3.1-6.6 NOR/cell	1 (4.0)	1 (4.0)	23 (92.0)	25 (100)
Total	33 (29.1)	17 (14.5)	60 (56.4)	110 (100)

Values are presented as numbers and percentages (%). Pearson’s Chi-square (p<0.005). NOR: nucleolar organizer region