raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:100993

Autosomal dominant spastic paraplegia type 12

Synonyms: SPG12

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

A pure form of hereditary spastic paraplegia characterized by a childhood- to adulthood-onset of slowly progressive lower limb spasticity and hyperreflexia of lower extremities, extensor plantar reflexes, distal sensory impairment, variable urinary dysfunction and pes cavus.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAutosomal dominant spastic paraplegia type 12SPG12
frParaplégie spastique autosomique dominante type 12= en
deSpastische Paraplegie, autosomal-dominante, Typ 12= en
esParaplejía espástica autosómica dominante tipo 12= en
itParaplegia spastica autosomica dominante, tipo 12= en
nlAutosomaal dominante spastische paraplegie type 12= en
ptParaplegia espástica autossómica dominante tipo 12= en
plAutosomalna dominująca paraplegia spastyczna typu 12= en
csAutozomálně dominantní spastická paraplegie, typ 12= en
ukАутосомно-домінантна спастична параплегія, тип 12= en
zh常染色体显性遗传痉挛性截瘫12型= en
trOtozomal dominant spastik parapleji tip 12= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM604805Evalidated
ICD-10G11.4NTBTattributedvalidated
ICD-118B44.00NTBTindexvalidated
MONDO0011489Evalidated
MeSHC537484Evalidated
UMLSC1858106Evalidated
GARD9586Evalidated

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

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
RTN2Disease-causing germline mutation(s) inAssessedHGNC:10468ENSG0000012574460318319q13.32reticulon 222232211[PMID]
UBAP1Disease-causing germline mutation(s) inAssessedHGNC:12461ENSG000001650066097879p13.3ubiquitin associated protein 132934340[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families27 casesWorldwideCase(s)Validated22232211[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_22232211[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

26 annotations · validated 2018-04-25
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002314Degeneration of the lateral corticospinal tracts
HP:0001288Gait disturbance
HP:0001347Hyperreflexia
HP:0007340Lower limb muscle weakness
HP:0002061Lower limb spasticity
HP:0007020Progressive spastic paraplegia
Frequent (79-30%)
HP:0003487Babinski sign
HP:0002169Clonus
HP:0030014Female sexual dysfunction
HP:0010831Impaired proprioception
HP:0002166Impaired vibration sensation in the lower limbs
HP:0002070Limb ataxia
HP:0007210Lower limb amyotrophy
HP:0040307Male sexual dysfunction
HP:0003394Muscle spasm
HP:0001761Pes cavus
HP:0002064Spastic gait
HP:0100561Spinal cord lesion
HP:0000020Urinary incontinence
HP:0000012Urinary urgency
Occasional (29-5%)
HP:0002607Bowel incontinence
HP:0007350Hyperreflexia in upper limbs
Excluded (0%)
HP:0012898Abnormal lower-limb motor evoked potentials
HP:0002921Abnormality of the cerebrospinal fluid
HP:0003457EMG abnormality
HP:0001250Seizure

Run the differential on the 6 obligate / very frequent terms

Annotation source: 10677333[PMID]_10441583[PMID]_12427890[PMID]_22232211[PMID]

7

Sources for this card