Laterality, HPV subtypes and immunohistochemistry for pRb and p16INK4a on fresh-frozen tissue blocks of RB
| Serial no. | Laterality of the tumour | HPV status | pRb | p16INK4a | HPV genotype |
| 1 | Left | + | − | + | 16 |
| 2 | Left | + | − | + | 16,59 |
| 3 | Left | + | − | + | 16 |
| 4 | Left | − | − | − | − |
| 5 | Right | + | − | + | 16,59 |
| 6 | Right | + | + | + | 82 |
| 7 | Left | + | + | + | 16,73 |
| 8 | Right | − | + | − | − |
| 9 | Right | + | − | + | 68 |
| 10 | Right | + | − | + | 16 |
| 11 | Left | − | − | − | − |
| 12 | Right | + | − | + | 16 |
| 13 | Left | + | − | + | 16 |
| 14 | Left | − | − | − | − |
| 15 | Left | − | + | − | − |
| 16 | Right | + | − | + | 35 |
| 17 | Left | − | − | − | − |
| 18 | Left | − | + | − | − |
| 19 | Right | − | + | − | − |
HPV, human papillomavirus; RB, retinoblastoma.