Variations in posterior fossa venous drainage with age
| Group | Right | Left | Codominant | Atretic Transverse Sinus | Occipital Sinus |
|---|---|---|---|---|---|
| I (n = 38) | 14 (37) | 8 (21) | 16 (42) | 2 (5) | 5 (13) |
| II (n = 17) | 6 (35) | 5 (30) | 6 (35) | 3 (18) | 2 (12) |
| III (n = 53) | 26 (50) | 9 (16) | 18 (34) | 7 (13) | 1 (2) |
| Total (n = 108) | 46 (44) | 22 (20) | 40 (37) | 6 (5) | 8 (7) |
Note.—Data in parentheses are percentages.