Symptom Information: Sort according to HPO 

1
(HPO:0001249) Intellectual disability 1089 / 7739
2
(HPO:0001263) Global developmental delay 853 / 7739
3
(HPO:0001250) Seizures 1245 / 7739
4
(HPO:0001285) Spastic tetraparesis 29 / 7739
5
(HPO:0001332) Dystonia 197 / 7739
6
(OMIM) Seizures, tonic 3 / 7739
7
(OMIM) Clonic seizures 3 / 7739
8
(OMIM) Generalized stiffening 1 / 7739
9
(MedDRA:10003830) Automatism 4 / 7739
10
(HPO:0001252) Muscular hypotonia 990 / 7739
11
(HPO:0001324) Muscle weakness 859 / 7739
12
(HPO:0008947) Infantile muscular hypotonia 482 / 7739
13
(HPO:0010547) Muscle flaccidity 466 / 7739
14
(OMIM) EEG shows burst suppression pattern 3 / 7739
15
(OMIM) EEG shows multifocal epileptic activity 1 / 7739
16
(OMIM) Hyperintensities in the basal ganglia and/or thalamus Thin corpus callosum (in some patients) 1 / 7739
17
(OMIM) Reduced posterior white matter volume (in some patients) 1 / 7739
18
(HPO:0000006) Autosomal dominant inheritance 2518 / 7739
19
(HPO:0002079) Hypoplasia of the corpus callosum rare [HPO:skoehler] 161 / 7739
20
(HPO:0003593) Infantile onset 249 / 7739
21
(HPO:0200134) Epileptic encephalopathy 42 / 7739