Symptom Information: Sort according to HPO 

1
(HPO:0000577) Exotropia 43 / 7739
2
(HPO:0000639) Nystagmus 555 / 7739
3
(HPO:0000750) Delayed speech and language development 197 / 7739
4
(HPO:0001249) Intellectual disability 1089 / 7739
5
(HPO:0001263) Global developmental delay 853 / 7739
6
(HPO:0001250) Seizures 1245 / 7739
7
(HPO:0001251) Ataxia 413 / 7739
8
(HPO:0001252) Muscular hypotonia 990 / 7739
9
(HPO:0001324) Muscle weakness 859 / 7739
10
(HPO:0001257) Spasticity 251 / 7739
11
(HPO:0001260) Dysarthria 329 / 7739
12
(HPO:0001510) Growth delay 295 / 7739
13
(HPO:0001922) Vacuolated lymphocytes 13 / 7739
14
(HPO:0001939) Abnormality of metabolism/homeostasis 328 / 7739
15
(HPO:0002305) Athetosis 31 / 7739
16
(HPO:0002540) Inability to walk 19 / 7739
17
(HPO:0002684) Thickened calvaria 32 / 7739
18
(OMIM) Height 2 S.D. below expected height 1 / 7739
19
(HPO:0008947) Infantile muscular hypotonia 482 / 7739
20
(HPO:0010547) Muscle flaccidity 466 / 7739
21
(MedDRA:10013976) Dyspraxia 3 / 7739
22
(OMIM) Increased urinary free sialic acid excretion (N-acetylneuraminic acid, 5-20x normal) Enlarged lysosomal vacuoles in lymphocytes and fibroblasts 1 / 7739
23
(HPO:0000007) Autosomal recessive inheritance 2538 / 7739