raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:412066

PRKAR1B-related neurodegenerative dementia with intermediate filaments

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

A rare, genetic neurodegenerative disease characterized by dementia and mild parkinsonism with poor levodopa response. Presenting clinical manifestations are memory problems, short attention span, disorientation, language impairment, rigidity, bradykinesia, postural instability and behavioral changes, including apathy, anxiety and delusions.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPRKAR1B-related neurodegenerative dementia with intermediate filaments
frDémence neurodégénérative avec filaments intermédiaires associée à PRKAR1B
dePRKAR1B-assoziierte neurodegenerative Demenz mit Intermediärfilamenten
esDemencia neurodegenerativa asociada a PRKAR1B con filamentos intermedios
itDemenza neurodegenerativa PRKAR1B-correlata con filamenti intermedi
nlPRKAR1B-gerelateerde neurodegeneratieve dementie met intermediaire filamenten
ptDemência neurodegenerativa com filamentos intermédios PRKAR1B-relacionada
plDemencja neurodegeneracyjna związana z PRKAR1B z filamentami pośrednimi
csPRKAR1B-vázaná neurodegenerativní demence s intermediárními filamenty
ukPRKAR1B-повязана нейродегенеративна деменція з помірно вираженими філаментами
zhPRKAR1B相关神经退行性痴呆伴
trOrta filamentli PRKAR1B-ilişkili nörodejeneratif demans

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10G31.8NTBTattributedvalidated
MONDO0018475Evalidated
UMLSC4751505Evalidated

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.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PRKAR1BDisease-causing germline mutation(s) inAssessedHGNC:9390ENSG000001881911769117p22.3protein kinase cAMP-dependent type I regulatory subunit beta24722252[PMID]_25108559[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families12 casesWorldwideCase(s)Validated24722252[PMID]_25108559[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_24722252[PMID]_25108559[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

23 annotations · validated 2017-07-19
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0000726Dementia
Very frequent (99-80%)
HP:0012757Abnormal neuron morphology
HP:0002145Frontotemporal dementia
HP:0000719Inappropriate behavior
HP:0002354Memory impairment
HP:0002333Motor deterioration
Frequent (79-30%)
HP:0000739Anxiety
HP:0000741Apathy
HP:0002067Bradykinesia
HP:0002506Diffuse cerebral atrophy
HP:0002527Falls
HP:0010794Impaired visuospatial constructive cognition
HP:0030216Inertia
HP:0002463Language impairment
HP:0003552Muscle stiffness
HP:0001300Parkinsonism
HP:0002172Postural instability
HP:0000736Short attention span
HP:0007311Short stepped shuffling gait
HP:0002362Shuffling gait
Occasional (29-5%)
HP:0006892Frontotemporal cerebral atrophy
Excluded (0%)
HP:0007373Motor neuron atrophy
HP:0002503Spinocerebellar tract degeneration

Run the differential on the 6 obligate / very frequent terms

Annotation source: 24722252[PMID]_25414037[PMID]_25108559[PMID]

7

Sources for this card