raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:171607

X-linked spastic paraplegia type 34

Synonyms: SPG34

Type
Disease
Group
Disorder
Inheritance
X-linked recessive
Age of onset
Adolescent, Adult, Childhood
Status
active

X-linked spastic paraplegia type 34 is a pure form of hereditary spastic paraplegia characterized by late childhood- to early adulthood-onset of slowly progressive spastic paraplegia with spastic gait and lower limb hyperreflexia, brisk tendon reflexes and ankle clonus. Lower limb pain and reduced lower limb vibratory sense is also reported in some older adult patients.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enX-linked spastic paraplegia type 34SPG34
frParaplégie spastique liée à l'X type 34= en
deSpastische Paraplegie, X-chromosomale, Typ 34= en
esParaplejía espástica ligada al cromosoma X tipo 34
itParaplegia spastica legata all'X, tipo 34= en
nlX-gebonden spastische paraplegie type 34= en
ptParaplegia espástica ligada ao X tipo 34= en
plParaplegia spastyczna sprzężona z chromosomem X typu 34= en
csX-vázaná spastická paraplegie, typ 34= en
ukХ-зчеплена спастична параплегія, тип 34= en
zhX连锁痉挛性截瘫34型= en
trX'e bağlı spastik parapleji tip 34= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM300750Evalidated
ICD-10G11.4NTBTattributedvalidated
ICD-118B44.02NTBTindexvalidated
MONDO0010418Evalidated
MeSHC567465Evalidated
UMLSC2677897Evalidated

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 (1):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SPG34Disease-causing germline mutation(s) inAssessedHGNC:32944reservedspastic paraplegia 34 (autosomal dominant)
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families24 casesWorldwideCase(s)Validated1084423[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_1084423[PMID]

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

8 annotations · validated 2018-05-24
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0011448Ankle clonus
HP:0003487Babinski sign
HP:0001348Brisk reflexes
HP:0001347Hyperreflexia
HP:0002166Impaired vibration sensation in the lower limbs
HP:0012514Lower limb pain
HP:0002061Lower limb spasticity
HP:0002362Shuffling gait

Annotation source: 18463901[PMID]

7

Sources for this card