Table 1: Relation of Basal Cisterns and Ventricle Size to Isotope Shunt Study (n = 38).

Shunt Study Findings

Malfunctioning

Normally Functioning

Cisterns

open

18

6

closed

6

8

Ventricles

small

3

4

normal

8

5

large

13

5

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Table 2: Relation of Basal Cisterns and Ventricle Size to Surgical Findings (n = 15).

Surgical Findings

No Drainage

Drainage

Cisterns

open

9

3

closed

0

3

Ventricles

small

1

1

normal

3

3

large

5

2

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