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. 2006 May;27(5):1083–1089.

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