| Biopsy N = 61 | |||
Positive | Negative | Total | ||
Visual tests | Positive | 11 (13.75) | 50 (62.5) | 61 (76.25) |
Negative | 2 (2.5) | 17 (21.25) | 19 (23.75) | |
| Total | 13 (16.25) | 67 (83.75) | 80 (100) |