Anastomosis of the IPS with the VVP in each anatomic type
| Characteristic | A | B | C-1 | C-2 | D | E | F |
|---|---|---|---|---|---|---|---|
| No. of sides | 1 | 29 | 23 | 8 | 5 | 3 | 14 |
| Pattern of anastomosis via | |||||||
| ACV (No., %) | 0 (0) | 21 (72.4) | 5 (21.7) | 8 (100) | 4 (80) | 3 (100) | 0 (0) |
| LCV (No., %) | 0 (0) | 4 (13.8) | 5 (21.7) | 1 (20) | 1 (20) | 0 (0) | 0 (0) |
| No anastomosis (No., %) | 1 (100) | 4 (13.8) | 13 (56.5) | 0 (0) | 0 (0) | 0 (0) | 14 (100) |
Note:—IPS indicates inferior petrosal sinus; VVP, vertebral venous plexus; ACV, anterior condylar vein; LCV, lateral condylar vein.