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Semi-quantitative scoring system of p53 and Ki-67 immunostaining
| Percentage of immunoreactive cells | Score | p53 and Ki-67 protein overexpression assessment | Reference |
|---|---|---|---|
| No reactivity | 0 | Negative | Zigeuner et al. [43] |
| Less than 10% | 1 | Negative | |
| 10–25% | 2 | Positive | |
| 26–50% | 3 | Positive | |
| 51–75% | 4 | Positive | |
| 76–90% | 5 | Positive | |
| More than 90% | 6 | Positive |
