Score | Staining pattern |
Score 0 | Completely negative. |
Score 1+ | Faint perceptile staining of the membrane in >10% of the malignant cells. |
Score 2+ | Moderate staining of the partial membrane in >10% of the malignant cells. |
Score 3+ | Strong circumferential staining of the entire membrane creating a fishnet pattern in >30% of the malignant cells. |