- Investigations and findings.
| Imaging | n (%) |
|---|---|
| Plain thoracic inlet and cervical spine x-ray | 90 (100) |
| Cervical rib | 76 (84.4) |
| Anomalous 1st rib | 12 (12.1) |
| Prominent 7th cervical transverse process | 2 (2.2) |
| Duplex scan (rest and provocation) | 90 (100) |
| Post-stenotic dilatation | 9 (10) |
| Subclavian artery aneurysm | 10 (11.1) |
| Arterial thrombosis | 7 (7.8) |
| Computed tomography angiography (rest and provocation) | 56 (62.2) |
| Conventional angiogram (rest and provocation) | 27 (30.0) |
| Venogram | 9 (10.0) |
Values are presented as number and precentage (%).