raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:444099

Autosomal dominant spastic paraplegia type 73

Synonyms: SPG73

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adult
Status
active

A pure form of hereditary spastic paraplegia characterized by adult onset of crural spastic paraparesis, hyperreflexia, extensor plantar responses, proximal muscle weakness, mild muscle atrophy, decreased vibration sensation at ankles, and mild urinary dysfunction. Foot deformities have been reported to eventually occur in some patients. No abnormalities are noted on brain magnetic resonance imaging and peripheral nerve conduction velocity studies.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAutosomal dominant spastic paraplegia type 73SPG73
frParaplégie spastique autosomique dominante type 73= en
deSpastische Paraplegie, autosomal-dominante, Typ 73= en
esParaplejía espástica autosómica dominante tipo 73= en
itParaplegia spastica autosomica dominante, tipo 73= en
nlAutosomaal dominante spastische paraplegie type 73= en
ptParaplegia espástica autossómica dominante tipo 73
plAutosomalna dominująca paraplegia spastyczna typu 73= en
csAutozomálně dominantní spastická paraplegie, typ 73= en
ukАутосомно-домінантна спастична параплегія, тип 73= en
zh常染色体显性遗传性痉挛性截瘫73型= en
trOtozomal dominant spastik parapleji tip 73= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM616282Evalidated
ICD-10G11.4NTBTattributedvalidated
ICD-118B44.00NTBTattributedvalidated
MONDO0014568Evalidated
UMLSC5568981Evalidated

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
CPT1CDisease-causing germline mutation(s) inAssessedHGNC:18540ENSG0000016916960884619q13.33carnitine palmitoyltransferase 1C25751282[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families1 familiesWorldwideFamily(ies)Validated25751282[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_25751282[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

19 annotations · validated 2018-04-25
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003487Babinski sign
HP:0002314Degeneration of the lateral corticospinal tracts
HP:0001347Hyperreflexia
HP:0002061Lower limb spasticity
HP:0007020Progressive spastic paraplegia
HP:0002064Spastic gait
Frequent (79-30%)
HP:0012898Abnormal lower-limb motor evoked potentials
HP:0008944Distal lower limb amyotrophy
HP:0009053Distal lower limb muscle weakness
HP:0003457EMG abnormality
HP:0001288Gait disturbance
HP:0002166Impaired vibration sensation in the lower limbs
HP:0007199Progressive spastic paraparesis
HP:0000020Urinary incontinence
HP:0000012Urinary urgency
Occasional (29-5%)
HP:0001761Pes cavus
Excluded (0%)
HP:0002921Abnormality of the cerebrospinal fluid
HP:0000726Dementia
HP:0001250Seizure

Run the differential on the 6 obligate / very frequent terms

Annotation source: 25751282[PMID]_23973755[PMID]

7

Sources for this card