Symptom Information: Sort according to HPO 

1
(HPO:0001347) Hyperreflexia Very frequent [Orphanet] 363 / 7739
2
(HPO:0000572) Visual loss Occasional [Orphanet] 272 / 7739
3
(HPO:0001252) Muscular hypotonia Frequent [Orphanet] 990 / 7739
4
(HPO:0000298) Mask-like facies Frequent [Orphanet] 44 / 7739
5
(HPO:0001601) Laryngomalacia Very frequent [Orphanet] 61 / 7739
6
(HPO:0002093) Respiratory insufficiency Very frequent [Orphanet] 410 / 7739
7
(HPO:0001276) Hypertonia Frequent [Orphanet] 317 / 7739
8
(HPO:0001608) Abnormality of the voice Very frequent [Orphanet] 126 / 7739
9
(HPO:0001249) Intellectual disability 1089 / 7739
10
(HPO:0000639) Nystagmus Occasional [Orphanet] 555 / 7739
11
(HPO:0004886) Congenital laryngeal stridor 3 / 7739
12
(OMIM) Congenital laryngeal abductor paralysis 1 / 7739
13
(HPO:0012795) Abnormality of the optic disc Occasional [Orphanet] 187 / 7739
14
(HPO:0011420) Death Frequent [Orphanet] 184 / 7739
15
(HPO:0004325) Decreased body weight Very frequent [Orphanet] 492 / 7739
16
(HPO:0012758) Neurodevelopmental delay Very frequent [Orphanet] 949 / 7739
17
(HPO:0001419) X-linked recessive inheritance 189 / 7739