The expression of mismatched repair genes and their correlation with clinicopathological parameters and response to neo-adjuvant chemotherapy in breast cancer

Table 8 MSH2

SCORE	Percentage of cells staining	Frequency	Percent	Valid percent	Cumulative percent
0	0%	12	38.70	38.70	38.70
1	<5%	0	0	0	38.70
2	5–20%	11	35.48	35.48	74.18
3	20–80%	8	25.80	25.80	100
4	80–100%	0	0	0	100

Like the results of H-score for MSH2, score based on percentage of positively staining cells for MSH2 was also low for most of the tumors. 23 cases out of 31 had a score of less than 2.