Symptom Information: Sort according to HPO 

1
(HPO:0000253) Progressive microcephaly 37 / 7739
2
(HPO:0000529) Progressive visual loss 54 / 7739
3
(HPO:0000546) Retinal degeneration 61 / 7739
4
(HPO:0000550) Undetectable electroretinogram 25 / 7739
5
(HPO:0000608) Macular degeneration 36 / 7739
6
(HPO:0000618) Blindness 124 / 7739
7
(HPO:0000648) Optic atrophy 238 / 7739
8
(HPO:0000654) Decreased light- and dark-adapted electroretinogram amplitude 17 / 7739
9
(HPO:0000716) Depression 99 / 7739
10
(HPO:0000737) Irritability 93 / 7739
11
(HPO:0000738) Hallucinations 60 / 7739
12
(HPO:0001249) Intellectual disability 1089 / 7739
13
(HPO:0001263) Global developmental delay 853 / 7739
14
(HPO:0001250) Seizures 1245 / 7739
15
(HPO:0001251) Ataxia 413 / 7739
16
(HPO:0001252) Muscular hypotonia 990 / 7739
17
(HPO:0001324) Muscle weakness 859 / 7739
18
(HPO:0001257) Spasticity 251 / 7739
19
(HPO:0001336) Myoclonus 115 / 7739
20
(HPO:0001371) Flexion contracture 220 / 7739
21
(HPO:0001939) Abnormality of metabolism/homeostasis 328 / 7739
22
(HPO:0002059) Cerebral atrophy 171 / 7739
23
(HPO:0002074) Increased neuronal autofluorescent lipopigment 10 / 7739
24
(HPO:0002353) EEG abnormality 188 / 7739
25
(HPO:0002360) Sleep disturbance 113 / 7739
26
(HPO:0002361) Psychomotor deterioration 26 / 7739
27
(HPO:0002371) Loss of speech 15 / 7739
28
(HPO:0005484) Postnatal microcephaly 32 / 7739
29
(OMIM) Blindness by age 2 1 / 7739
30
(OMIM) Cognitive decline in older patients 1 / 7739
31
(HPO:0008947) Infantile muscular hypotonia 482 / 7739
32
(HPO:0010547) Muscle flaccidity 466 / 7739
33
(OMIM) Cerebral atrophy, progressive 4 / 7739
34
(OMIM) MRI shows hypointensity of the thalami early-on 1 / 7739
35
(OMIM) MRI shows high signal intensity of the white matter later 1 / 7739
36
(OMIM) Autofluorescent lipopigment in neurons 11 / 7739
37
(OMIM) Granular material in neurons 1 / 7739
38
(OMIM) Hyperexcitability 2 / 7739
39
(OMIM) Granular osmiophilic cytoplasmic deposits (GROD) ultrastructurally in cells 2 / 7739
40
(OMIM) Decreased activity of PPT1 1 / 7739
41
(OMIM) Fatty acid pattern of serum lecithin shows increased arachidonic acid and decreased linoleic acid 1 / 7739
42
(HPO:0000007) Autosomal recessive inheritance 2538 / 7739
43
(HPO:0003674) Onset 32 / 7739