Table 2 Findings on Imaging Studies Ordered for Macrocephaly. Many studies had more than one finding (n = 86)

Ventriculomegaly

48

Enlargement of subarachnoid spaces

42

Subdural hygroma / hematoma

24

Developmental anomaly

16

Cyst

15

Cerebellar ectopia/Chiari

10

Intracerebral/intraventricular hemorrhage

6

Skull abnormalities

5

Tumor

4

Calcification

3

White matter abnormality

3

Vein of Galen aneurysm

2

Enlarged perivascular spaces

1