Symptom Information: Sort according to HPO 

1
(HPO:0000602) Ophthalmoplegia Very frequent [Orphanet] hallmark [HPO] 21888047 IBIS 56 / 7739
2
(HPO:0001284) Areflexia Very frequent [Orphanet] hallmark [HPO] 21827899 IBIS 198 / 7739
3
(HPO:0001315) Reduced tendon reflexes Very frequent [Orphanet] 24816431 IBIS 160 / 7739
4
(HPO:0000365) Hearing impairment Very frequent [Orphanet] 21888047 IBIS 539 / 7739
5
(HPO:0001251) Ataxia Very frequent [Orphanet] hallmark [HPO] 21888047 IBIS 413 / 7739
6
(HPO:0100022) Abnormality of movement Very frequent [Orphanet] 24816431 IBIS 129 / 7739
7
(HPO:0000648) Optic atrophy Very frequent [Orphanet] 21888047 IBIS 238 / 7739
8
(HPO:0000639) Nystagmus 22928142 IBIS 555 / 7739
9
(HPO:0000815) Hypergonadotropic hypogonadism 21888047 IBIS 48 / 7739
10
(HPO:0001249) Intellectual disability 24816431 IBIS 1089 / 7739
11
(HPO:0001252) Muscular hypotonia 21888047 IBIS 990 / 7739
12
(HPO:0001324) Muscle weakness 24816431 IBIS 859 / 7739
13
(HPO:0001272) Cerebellar atrophy 18775955 IBIS 197 / 7739
14
(HPO:0001328) Specific learning disability 8133312 IBIS 114 / 7739
15
(HPO:0002133) Status epilepticus 8133312 IBIS 59 / 7739
16
(HPO:0002305) Athetosis 21888047 IBIS 31 / 7739
17
(HPO:0002312) Clumsiness 8133312 IBIS 28 / 7739
18
(HPO:0002910) Elevated hepatic transaminases 22928142 IBIS 158 / 7739
19
(HPO:0003390) Sensory axonal neuropathy 21888047 IBIS 26 / 7739
20
(HPO:0006957) Loss of ability to walk 24816431 IBIS 7 / 7739
21
(HPO:0200134) Epileptic encephalopathy 18775955 IBIS 42 / 7739
22
(HPO:0000496) Abnormality of eye movement 22928142 IBIS 79 / 7739
23
(MedDRA:10059396) Mitochondrial DNA depletion 18775955 IBIS 5 / 7739
24
(OMIM) Brainstem atrophy 18775955 IBIS 5 / 7739
25
(OMIM) Mitochondrial DNA depletion in brain tissue 18775955 IBIS 1 / 7739
26
(OMIM) Decreased mitochondrial respiratory chain complex activity 18775955 IBIS 2 / 7739
27
(HPO:0000134) Female hypogonadism 18775955 IBIS 5 / 7739
28
(HPO:0006827) Atrophy of the spinal cord 18775955 IBIS 5 / 7739
29
(HPO:0200125) Mitochondrial respiratory chain defects 18775955 IBIS 6 / 7739
30
(HPO:0001250) Seizures 21827899 IBIS 1245 / 7739
31
(HPO:0001271) Polyneuropathy 21402391 IBIS 56 / 7739