Table 1. Clinical features in cases of SDH-related leukoencephalopathy.

Clinical Features	Percentage of Cases
Age of Onset	Average: 11.21 mo. Range: Birth – 20 mo.
Consanguinity	67% (13/19)
Abrupt Decompensation	72% (14/19)
Microcephaly	50% (8/17)
Truncal Hypotonia	75% (13/17)
Limb spasticity	89% (17/19)
Ataxia	92% (12/14)
Dystonia	25% (4/17)
Acquired Independent Ambulation	25% (5/17)
Current Functional Level	7 Individuals with a severe spastic tetraparesis 11 Individuals with moderate or severe cognitive impairment 5 Individuals died at mean age of 5 years

Key: mo. = month, N/A=Not Available, yrs.= years