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Published adverse events after flexible endoscopic therapy of Zenker’s diverticulum n (%)
| Adverse events | 80/678 (11.8%) |
| Micro perforations | 52/678 (7.7) |
| Cervical emphysema | 1 |
| Mediastinal emphysema | 5 |
| Subcutaneous emphysema | 25 |
| Unspecified | 21 |
| Macro perforations | 4/678 (0.6) |
| Bleeding | 9/678 (1.3) |
| Infection | 12/678 (1.8) |
| Fever | 10 |
| Pneumonia | 1 |
| Neck abscess | 1 |
| Death | 1/678 (0.1) |
| Adverse events, not otherwise specified | 2/678 (0.3) |
