raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:95432

Primary progressive aphasia

Synonyms: Mesulam syndrome · PPA

Type
Clinical group
Group
Group of disorders
Inheritance
Multigenic/multifactorial, Not applicable
Age of onset
Adult
Status
active

Primary progressive aphasia (PPA) is a neurodegenerative disorder, characterized by a primary dissolution of language, with relative sparing of other mental faculties for at least the first 2 years of illness. PPA is recognized as the language variant in the frontotemporal dementia (FTD) spectrum of disorders. PPA can be classified into 3 subtypes based on specific speech and language features: semantic dementia (SD), progressive non-fluent aphasia (PNFA) and logopenic progressive aphasia (lv-PPA).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPrimary progressive aphasiaMesulam syndrome · PPA
frAphasie primaire progressivePPA · Syndrome de Mesulam
deAphasie, primäre progressiveMesulam-Syndrom · PPA
esAfasia progresiva primariaAPP · Síndrome de Mesulam
itAfasia primitiva progressivaPPA · Sindrome di Mesulam
nlPrimaire progressieve afasiePPA · Syndroom van Mesulam
ptAfasia primária progressiva
plPierwotna postępująca afazjaPPA · Zespół Mesulama
csPrimární progresivní afáziePPA · Mesulamův syndrom
ukПервинна прогресуюча афазіяСиндром Мезулама · PPA
zh原发性进行性失语Mesulam综合征
trPrimer ilerleyici afaziPPA · Mesulam sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-116D83NTBTindexvalidated
MONDO0019806Evalidated
MeSHD018888Evalidated
UMLSC0282513Evalidated
GARD8541Evalidated
MedDRA10081268Evalidated

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):

Children (3):

4

Genes

0 direct

Orphanet records no gene directly on this code.

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Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0007 / 100 000WorldwideValue and classNot yet validated24108322[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.

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HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card