| Authors | R. Yasumatsu et al. | C. E. de Araujo et al. | D. Biswas et al. |
| cases | 27 | 20 | 31 |
| Vagus | 10 | 7 | 2 |
| Sympathetic trunk | 6 | 4 | 1 |
| Cervical plexus | 5 | 3 | 0 |
| Brachial plexus | 3 | 4 | 5 |
| Hypoglossal nerve | 2 | 1 | 1 |
| Accessory nerve | 1 | 0 | 0 |
| Glossopharyngeal nerve | 0 | 0 | 1 |
| Facial nerve | 0 | 0 | 3 |
| Lingual nerve | 0 | 1 | 0 |
| Not seen | 0 | 0 | 9 |