raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1993

Pai syndrome

Synonyms: Median cleft of the upper lip-corpus callosum lipoma-midline facial cutaneous polyps syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Unknown
Age of onset
Antenatal, Neonatal
Status
active

A rare frontonasal dysplasia characterized by median cleft of the upper lip (MCL), midline polyps of the facial skin, nasal mucosa, and pericallosal lipomas. Hypertelorism with ocular anomalies are also observed, generally with normal neuropsychological development.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPai syndromeMedian cleft of the upper lip-corpus callosum lipoma-midline facial cutaneous polyps syndrome
frSyndrome de PaiSyndrome de fente médiane de la lèvre supérieure-lipome du corps calleux-polypes cutanés médiane de la face
dePai-SyndromMediane Oberlippenspalte-Corpus-callosum-Lipom-kutane Gesichtspolypen der Mittellinie-Syndrom
esSíndrome de PaiSíndrome de hendidura media del labio superior-lipoma del cuerpo calloso-pólipos cutáneos en la línea media
itSindrome di PaiSchisi mediana del labbro superiore - lipoma del corpo calloso - polipi cutanei
nlSyndroom van PaiMediaan gespleten bovenlip - lipoom van corpus callosum - faciale huidpoliepen op de middellijn-syndroom · Mediane schisis van bovenlip - lipoom van corpus callosum - faciale huidpoliepen op de middellijn-syndroom
ptSíndrome PaiSíndrome de fenda mediana do lábio superior-lipoma do corpo caloso-pólipos cutâneos
plZespół PaiPośrodkowy rozszczep górnej wargi - tłuszczak ciała modzelowatego - polipy skórne
csPaiův syndromSyndrom zahrnující rozštěp horního rtu, lipom corporis callosi a kožní polyp
ukСиндром ПаяСиндром серединної розщілини верхньої губи - ліпоми мозолистого тіла - шкірних поліпів середньої лінії обличчя
zhPai综合征上唇人中区裂-胼胝体发育不良-面中线部位皮肤性息肉综合征
trPai sendromuÜst dudağın medyan yarığı-korpus kallozum lipomu-orta hat fasiyal kutanöz polip sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM155145Evalidated
ICD-10Q87.8NTBTattributedvalidated
ICD-11LD2F.1YNTBTindexvalidated
MONDO0007956Evalidated
MeSHC536135Evalidated
UMLSC1835087Evalidated
GARD3439Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families67 casesWorldwideCase(s)Validated30195458[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_30195458[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

16 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000175Cleft palate
HP:0005280Depressed nasal bridge
HP:0000161Median cleft lip
HP:0006866Midline central nervous system lipomas
HP:0100582Nasal polyposis
HP:0010609Skin tags
HP:0001482Subcutaneous nodule
Frequent (79-30%)
HP:0000190Abnormal oral frenulum morphology
HP:0000193Bifid uvula
HP:0000316Hypertelorism
HP:0000506Telecanthus
Occasional (29-5%)
HP:0007370Aplasia/Hypoplasia of the corpus callosum
HP:0000494Downslanted palpebral fissures
HP:0002084Encephalocele
HP:0000612Iris coloboma
HP:0004122Midline defect of the nose

Run the differential on the 7 obligate / very frequent terms

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Sources for this card