Frequency of each variation of superficial middle cerebral vein and sphenoparietal sinus
| Superficial Middle Cerebral Vein | Sphenoparietal Sinus | ||
|---|---|---|---|
| Type | No. of Sites (%) | Type | No. of Sites (%) |
| A | 29 (39) | a | 52 (72) |
| B | 22 (30) | b | 3 (4) |
| C | 8 (11) | c | 12 (14) |
| D | 6 (8) | |⟶( | B 4 |
| Mixed type | 2 (2) | C 3 | |
| D 5 | |||