Table 1 TK1 staining in normal and malignant tissue
| Tissue type | Negative | Positive |
|---|---|---|
| Lung adenocarcinoma | 20 | 23 |
| Lung squamous cell carcinoma | 35 | 94 |
| Normal lung | 40 | 0 |
| Cancer adjacent normal lung | 10 | 0 |
| Breast ductal carcinoma | 6 | 19 |
| Normal breast | 24 | 0 |
| Colon adenocarcinoma | 9 | 26 |
| Normal colon | 10 | 0 |