Symptom Information: Sort according to HPO 

1
(HPO:0001387) Joint stiffness Very frequent [Orphanet] 322 / 7739
2
(HPO:0000572) Visual loss Frequent [Orphanet] 272 / 7739
3
(HPO:0000618) Blindness 124 / 7739
4
(HPO:0001250) Seizures Very frequent [Orphanet] 1245 / 7739
5
(HPO:0000252) Microcephaly Very frequent [Orphanet] 832 / 7739
6
(HPO:0000648) Optic atrophy 238 / 7739
7
(HPO:0000505) Visual impairment Frequent [Orphanet] 297 / 7739
8
(HPO:0001249) Intellectual disability 1089 / 7739
9
(HPO:0001257) Spasticity 251 / 7739
10
(HPO:0001276) Hypertonia Very frequent [Orphanet] 317 / 7739
11
(HPO:0000365) Hearing impairment Very frequent [Orphanet] 539 / 7739
12
(HPO:0001141) Severe visual impairment 11 / 7739
13
(HPO:0005193) Restricted large joint movement 1 / 7739
14
(OMIM) Severe hearing defect 1 / 7739
15
(HPO:0012758) Neurodevelopmental delay Very frequent [Orphanet] 949 / 7739
16
(HPO:0012795) Abnormality of the optic disc Very frequent [Orphanet] 187 / 7739
17
(HPO:0001417) X-linked inheritance 173 / 7739
18
(HPO:0003819) Death in childhood 42 / 7739