Table 1:

IHA demographics and imaging indications of the cohort

	No Referable Symptoms	Symptomatic	P Value
Total	40	17
Demographics
Male	20	7	.54
Female	20	10	.54
Average age (yr)	6.1	10.2	.30
Age range	8 Days to 20 years	11 Months to 17 years
Imaging indication
Seizures	9	5	.58
Developmental delays	8	3	.84
Headaches/migraines	4	0	.18
Vision problems	4	1	.62
Hearing problems	2	0	.35
Trauma	2	0	.35
Chiari diagnosed in utero	2	0	.35
Short stature	1	2	.15
Fetal alcohol syndrome	1	1	.53
Other	8^{^a}	5^{^b}

↵a Tongue hemihypertrophy, myelomeningocele, scalp mass, Horner syndrome, multiple sclerosis, lower extremity pain, and spasms.
↵b Craniosynostosis, hydrocephalus on fetal ultrasound, panhypopituitarism, and hypothyroidism.