Staining pattern | Staining score |
---|---|
Membrane staining is observed in < 10% of the tumour cells | 0 |
A partial and faint membrane staining is detected in > 10% of the tumour cells | 1+ |
A weak to moderate complete membrane staining is detected in > 10% of the tumour cells | 2+ |
A moderate to strong complete membrane staining is detected in > 10% of the tumour cells | 3+ |