Symptom Information: Sort according to HPO 

1
(HPO:0000639) Nystagmus Frequent [Orphanet] 555 / 7739
2
(HPO:0000708) Behavioral abnormality Frequent [Orphanet] 212 / 7739
3
(HPO:0001250) Seizures Frequent [Orphanet] 1245 / 7739
4
(HPO:0001252) Muscular hypotonia Very frequent [Orphanet] 990 / 7739
5
(HPO:0001889) Megaloblastic anemia Very frequent [Orphanet] 28 / 7739
6
(HPO:0002017) Nausea and vomiting Occasional [Orphanet] 134 / 7739
7
(HPO:0002120) Cerebral cortical atrophy Frequent [Orphanet] 187 / 7739
8
(HPO:0002066) Gait ataxia Occasional [Orphanet] 327 / 7739
9
(HPO:0004372) Reduced consciousness/confusion Occasional [Orphanet] 73 / 7739
10
(HPO:0000572) Visual loss Occasional [Orphanet] 272 / 7739
11
(HPO:0012758) Neurodevelopmental delay Frequent [Orphanet] 949 / 7739
12
(HPO:0004325) Decreased body weight Frequent [Orphanet] 492 / 7739
13
(HPO:0100543) Cognitive impairment Occasional [Orphanet] 230 / 7739