Table 1.

Immunohistochemical Scoring Parameters

Point Score	A	B	AXB
0	No cells with a positive reaction.	No color reaction.	0–1 = negatif
1	≤10% cells with a positive reaction.	The low intensity of the color reaction.	2–3 = low
2	11%-50% cells with a positive reaction.	The medium intensity of the color reaction.	4–8 = medium
3	51%-80% of cells with a positive reaction.	Intense color reaction.	9–12 = strong
4	80% cells with a positive reaction.

Notes: The IRS semiquantitative scale is a product of the percentage of the positive cells score (A) with the intensity of staining score (B), becoming an immunoreactive score (IRS) = (A x B).