Symptom Information: Sort according to HPO 

1
(HPO:0000512) Abnormal electroretinogram Very frequent [Orphanet] 61 / 7739
2
(HPO:0000708) Behavioral abnormality Occasional [Orphanet] 212 / 7739
3
(HPO:0001107) Ocular albinism Very frequent [Orphanet] 40 / 7739
4
(HPO:0001250) Seizures Very frequent [Orphanet] 1245 / 7739
5
(HPO:0001252) Muscular hypotonia Very frequent [Orphanet] 990 / 7739
6
(HPO:0001939) Abnormality of metabolism/homeostasis Frequent [Orphanet] 328 / 7739
7
(HPO:0002167) Neurological speech impairment Frequent [Orphanet] 308 / 7739
8
(HPO:0002066) Gait ataxia Occasional [Orphanet] 327 / 7739
9
(HPO:0002353) EEG abnormality Very frequent [Orphanet] 188 / 7739
10
(HPO:0008046) Abnormality of the retinal vasculature Very frequent [Orphanet] 41 / 7739
11
(HPO:0100022) Abnormality of movement Frequent [Orphanet] 129 / 7739
12
(HPO:0000572) Visual loss Very frequent [Orphanet] 272 / 7739
13
(HPO:0000478) Abnormality of the eye Frequent [Orphanet] 126 / 7739
14
(HPO:0012758) Neurodevelopmental delay Very frequent [Orphanet] 949 / 7739
15
(HPO:0100543) Cognitive impairment Frequent [Orphanet] 230 / 7739
16
(HPO:0012795) Abnormality of the optic disc Frequent [Orphanet] 187 / 7739