Childhood encephalopathy due to thiamine pyrophosphokinase deficiency

General Information (adopted from Orphanet):

Synonyms, Signs: ENCEPHALOPATHY, EPISODIC, DUE TO THIAMINE PYROPHOSPHOKINASE DEFICIENCY
THMD5
Number of Symptoms 28
OrphanetNr: 293955
OMIM Id: 614458
ICD-10:
UMLs:
MeSH:
MedDRA:
Snomed:

Prevalence, inheritance and age of onset:

Prevalence: No data available.
Inheritance: Autosomal recessive
[Orphanet]
Age of onset: Neonatal
Infancy
[Orphanet]

Disease classification (adopted from Orphanet):

Parent Diseases: Disorder of thiamin metabolism and transport
 -Rare genetic disease

Symptom Information: Sort by abundance 

1
(HPO:0002321) Vertigo 58 / 7739
2
(HPO:0002371) Loss of speech rare [HPO:skoehler] 15 / 7739
3
(HPO:0001263) Global developmental delay rare [HPO:skoehler] 853 / 7739
4
(HPO:0001251) Ataxia 413 / 7739
5
(HPO:0001250) Seizures rare [HPO:skoehler] 1245 / 7739
6
(HPO:0001332) Dystonia 197 / 7739
7
(HPO:0001327) Photomyoclonic seizures 125 / 7739
8
(HPO:0001257) Spasticity 251 / 7739
9
(HPO:0001712) Left ventricular hypertrophy rare [HPO:skoehler] 76 / 7739
10
(HPO:0003128) Lactic acidosis 116 / 7739
11
(HPO:0008947) Infantile muscular hypotonia 482 / 7739
12
(HPO:0010547) Muscle flaccidity 466 / 7739
13
(HPO:0001252) Muscular hypotonia 990 / 7739
14
(HPO:0001324) Muscle weakness 859 / 7739
15
(OMIM) Decreased thiamine pyrophosphate 1 / 7739
16
(OMIM) Dizziness, episodic 1 / 7739
17
(HPO:0003812) Phenotypic variability 129 / 7739
18
(OMIM) Encephalopathic episodes, often associated with infection 1 / 7739
19
(OMIM) Lactic acidosis, episodic 2 / 7739
20
(OMIM) Increased urinary alpha-ketoglutaric acid, intermittent 1 / 7739
21
(OMIM) Decreased serum thiamine pyrophosphate 1 / 7739
22
(OMIM) Loss of gait (in some) 1 / 7739
23
(OMIM) Abnormal white matter signals, in the basal ganglia or cerebellum seen on brain MRI 1 / 7739
24
(OMIM) Normal cognition 7 / 7739
25
(OMIM) Disturbed gait 1 / 7739
26
(OMIM) Metabolic crises 2 / 7739
27
(HPO:0000007) Autosomal recessive inheritance 2538 / 7739
28
(OMIM) Pyruvate oxidation defect 1 / 7739

Associated genes:

ClinVar (via SNiPA)

Gene symbol Variation Clinical significance Reference

Additional Information:

Description: (OMIM) Episodic encephalopathy due to thiamine pyrophosphokinase deficiency is an autosomal recessive metabolic disorder due to an inborn error of thiamine metabolism. The phenotype is highly variable, but in general, affected individuals have onset in early childhood of acute ...
Clinical Description OMIM Mayr et al. (2011) reported 5 individuals from 3 unrelated families with variable manifestations of thiamine pyrophosphokinase deficiency. Two sisters had the most severe phenotype compared to the other patients. The older sister showed developmental delay from the ...
Molecular genetics OMIM In 5 patients from 3 unrelated families with THMD5, Mayr et al. (2011) identified homozygous or compound heterozygous mutations in the TPK1 gene (606370.0001-606370.0005).