Symptom Information: Sort according to HPO 

1
(HPO:0000519) Congenital cataract 73 / 7739
2
(HPO:0000639) Nystagmus 555 / 7739
3
(HPO:0001181) Adducted thumb 31 / 7739
4
(HPO:0001249) Intellectual disability 1089 / 7739
5
(HPO:0001250) Seizures 1245 / 7739
6
(HPO:0001510) Growth delay 295 / 7739
7
(HPO:0001873) Thrombocytopenia 224 / 7739
8
(HPO:0001889) Megaloblastic anemia 28 / 7739
9
(HPO:0002510) Spastic tetraplegia 54 / 7739
10
(HPO:0002521) Hypsarrhythmia 43 / 7739
11
(HPO:0007266) Cerebral dysmyelination 13 / 7739
12
(HPO:0008734) Decreased testicular size 105 / 7739
13
(HPO:0011451) Congenital microcephaly 6 / 7739
14
(MedDRA:10067601) Dysmyelination 5 / 7739
15
(HPO:0001276) Hypertonia 317 / 7739
16
(OMIM) Hypsarrhythmia or severe multifocal epileptic abnormalities with poor background activity on EEG 1 / 7739
17
(OMIM) Decrease plasma serine (fasting) 2 / 7739
18
(OMIM) Decreased CSF serine 2 / 7739
19
(OMIM) Decreased PHGDH activity (fibroblasts) 1 / 7739
20
(OMIM) Normal-to-decreased plasma glycine (fasting) 1 / 7739
21
(OMIM) Decreased CSF glycine 2 / 7739
22
(HPO:0000007) Autosomal recessive inheritance 2538 / 7739