raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98808

Autosomal dominant dopa-responsive dystonia

Synonyms: Autosomal dominant Segawa syndrome · DYT5a · GTPCH1-deficient DRD · GTPCH1-deficient dopa-responsive dystonia · HPD with marked diurnal fluctuation · Hereditary progressive dystonia with marked diurnal fluctuation

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Not applicable
Age of onset
Childhood
Status
active

A rare neurometabolic disorder characterized by childhood-onset dystonia that shows a dramatic and sustained response to low doses of levodopa (L-dopa) and that may be associated with parkinsonism at an older age.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAutosomal dominant dopa-responsive dystoniaAutosomal dominant Segawa syndrome · DYT5a · GTPCH1-deficient DRD · GTPCH1-deficient dopa-responsive dystonia · HPD with marked diurnal fluctuation · Hereditary progressive dystonia with marked diurnal fluctuation
frDystonie dopa-sensible autosomique dominanteDYT5a · Dystonie progressive héréditaire avec fluctuations diurnes marquées · Syndrome de Segawa autosomique dominant
deDopa-responsive Dystonie, autosomal-dominanteDYT5a · GTPCH1-defiziente DRD · GTPCH1-defiziente dopa-responsive Dystonie · Hereditäre progressive Dystonie mit tageszeitlicher Fluktuation · Segawa-Syndrom, autosomal-dominantes
esDistonía dopa-sensible autosómica dominanteDRD deficiente en GTPCH1 · DYT5a · Distonía dopa-sensible deficiente en GTPCH1 · Distonía hereditaria progresiva con marcada fluctuación diurna · HPD con marcada fluctuación diurna · Síndrome de Segawa autosómico dominante
itDistonia Dopa-sensibile autosomica dominanteDRD da deficit di GTPCH1 · DYT5a · Distonia Dopa-sensibile da deficit di GTPCH1 · Distonia progressiva ereditaria con marcata fluttuazione diurna · HPD con marcata fluttuazione diurna · Sindrome di Segawa autosomica dominante
nlAutosomaal dominante doparesponsieve dystonieAutosomaal dominant syndroom van Segawa · DYT5a · Erfelijke progressieve dystonie met duidelijke diurnale fluctuatie · GTPCH1-deficiëntie DRD · GTPCH1-deficiëntie doparesponsieve dystonie · HPD met duidelijke diurnale fluctuatie · Hereditaire progressieve dystonie met duidelijke diurnale fluctuatie
ptDistonia sensível à dopa autossómica dominante
plAutosomalna dominująca dystonia reagująca na lewodopęAutosomalny dominujący zespół Segawa · DRD z deficytem GTPCH1 · Dystonia reagująca na lewodopę z deficytem GTPCH1 · DYT5a
csAutozomálně dominantní dopa-responzivní dystonieDYT5a · GTPCH1-deficientní DRD · GTPCH1-deficientní dopa-responzivní dystonie · HPD s výraznou diurnální fluktuací · Hereditární progresivní dystonie s výraznou diurnální fluktuací · Autozomálně dominantní Segawův syndrom
ukАутосомно-домінантна дофа-залежна дистоніяАутосомно-домінантний синдром Сегави · DYT5a · GTPCH1-дефіцитна дофа-реактивна дистонія · DRD з дефіцитом GTPCH1 · Спадкова прогресуюча дистонія з вираженими добовими коливаннями · HPD з вираженими добовими коливаннями
zh常染色体显性遗传多巴反应性肌张力障碍昼夜波动明显的遗传性进行性肌张力障碍
trOtozomal dominant dopa-duyarlı distoniDYT5a · GTPCH1-eksik DRD · Otozomal baskın Segawa sendromu · Diurnal belirgin dalgalanma ile seyreden HPD · GTPCH1 eksikliği olan dopaya duyarlı distoni · Diurnal belirgin dalgalanma ile seyreden kalıtsal ilerleyici distoni

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM128230BTNTvalidated
OMIM619911BTNTvalidated
ICD-10G24.1NTBTattributedvalidated
ICD-118A02.11NTBTindexvalidated
MONDO0971063Evalidated
MONDO971063Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
IMPDH2Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:6053ENSG000001780351466913p21.31inosine monophosphate dehydrogenase 234305140[PMID]
NR4A2Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:7981ENSG000001532346018282q24.1nuclear receptor subfamily 4 group A member 231922365[PMID]
GCH1Disease-causing germline mutation(s) inAssessedHGNC:4193ENSG0000013197960022514q22.2GTP cyclohydrolase 1
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 1 000 000—EuropeClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

34 annotations · validated 2018-02-28
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0002071Abnormality of extrapyramidal motor function
HP:0045007Abnormality of the substantia nigra
HP:0000739Anxiety
HP:0001251Ataxia
HP:0003487Babinski sign
HP:0001348Brisk reflexes
HP:0003785Decreased CSF homovanillic acid concentration
HP:0000716Depression
HP:0012378Fatigue
HP:0004373Focal dystonia
HP:0002066Gait ataxia
HP:0000365Hearing impairment
HP:0002451Limb dystonia
HP:0002395Lower limb hyperreflexia
HP:0001300Parkinsonism
HP:0001761Pes cavus
HP:0002174Postural tremor
HP:0002063Rigidity
HP:0002360Sleep abnormality
HP:0001762Talipes equinovarus
HP:0000473Torticollis
HP:0008297Transient hyperphenylalaninemia
Occasional (29-5%)
HP:0002067Bradykinesia
HP:0000722Compulsive behaviors
HP:0007325Generalized dystonia
HP:0000666Horizontal nystagmus
HP:0000822Hypertension
HP:0000821Hypothyroidism
HP:0002166Impaired vibration sensation in the lower limbs
HP:0002601Paresis of extensor muscles of the big toe
HP:0005876Progressive flexion contractures
HP:0001370Rheumatoid arthritis
HP:0002650Scoliosis
Excluded (0%)
HP:0001249Intellectual disability

Annotation source: 22030388[PMID]_20482602[PMID]_16908750[PMID]_12084887[PMID]_11346370[PMID]_1899474[PMID]_3762960[PMID]_942621[PMID]

7

Sources for this card