Patient 1
Patient 2
FOXG1 syndrome (n=29)a
Sex female female 21 females; 8 males
Age at least follow-up 31 years 8 years 10 months to 34 years
Growth
Failure to thrive (+) (+) 21/22
Postnatal microcephaly (+) (+) 24/24
Development
Intellectual disability (+) (+) 29/29
Absent language (+) (+) 27/28
Sitting (−) (+) 6/26
Walking (−) (−) 2/29
Motor and dyskinesias
Hypotonia (+) (+) 19/19
Involuntary movements (+) (+) 21/23
Stereotypic movements (+) (+) 11/14
Strabismus (+) (−) 11/12
Bruxism (−) (+) 18/24
Epilepsy (+) (−) 20/28
Feeding difficulties (+) (+) 15/20
Brain MRI
Hypoplasia of corpus callosum (+) (+) 21/23