Overexpression of Kynurenine 3-Monooxygenase Correlates with Cancer Malignancy and Predicts Poor Prognosis in Canine Mammary Gland Tumors

Table 2

Classification of KMO expression as determined by immunoreactive score (IRS).

Intensity of immunoreactivity	Score	Proportion reactive	Score
No staining	0	No staining	0
Weak cytoplasmic staining	1	< 10%	1
Moderate cytoplasmic staining	2	10%-50%	2
Strong cytoplasmic staining	3	> 50%	3