Level of obstruction and histology in 193 dacryocystorhinostomies
| Normal | Chronic inflammation | Specific | |
|---|---|---|---|
| *Two specimens from one patient. | |||
| Proximal | 12 | 19 | 0 |
| Distal | 27 | 108 | 2 (sarcoidosis*) |
| Multiple levels | 5 | 5 | 0 |
| Functional | 0 | 14 | 1 (transitional cell papilloma) |
| Total | 44 | 146 | 3 |