Table 4.

Scale for scoring of staining results in tissue array B

Score	Classification	Definition
0	No staining	No specific staining
1	Poor staining	Very insufficient staining: presenting a very weak staining signal, false-negative staining of cells or tissue components, or false-positive staining reaction in cells or tissue components. Incompatible with cell counting.
2	Borderline staining	Insufficient staining: presenting too weak staining, false-negative staining of cells, or false-positive staining of cells. Incompatible with cell counting
3	Good staining	Staining is acceptable visualizing the appropriate cells and tissue components. The staining still could be optimized for improving the staining intensity and signal-to-noise ratio. Suitable for cell counting.
4	Optimal staining	Perfect or close to perfect staining result visualizing the appropriate cells and tissue components with a high signal-to-noise ratio. Suitable for cell counting.