raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1410

Uncombable hair syndrome

Synonyms: Pili trianguli et canaliculi

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Childhood
Status
active

Uncombable hair syndrome (UHS), or pili trianguli et canaliculi, is a rare scalp hair shaft dysplasia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enUncombable hair syndromePili trianguli et canaliculi
frSyndrome des cheveux incoiffables= en
deSyndrom der nicht kämmbaren Haare= en
esSíndrome del cabello impeinable
itSindrome dei capelli non pettinabiliPeli triangolari e scanalati
nlOnkambaar haar-syndroom= en
ptSíndrome cabelo impenteável= en
plZespół włosów niedających się uczesaćWłosy trójkątne i kanalikowate
csSyndrom neučesatelných vlasů= en
ukСиндром нечесаного волосся= en
zh难梳头发综合征难梳头发综合征
trTaranamayan saç sendromu= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM191480BTNTvalidated
OMIM617251BTNTvalidated
OMIM617252BTNTvalidated
ICD-10Q84.1NTBTattributedvalidated
ICD-11EC21.0NTBTindexvalidated
MONDO0008621Evalidated
MeSHC536939Evalidated
UMLSC0432347Evalidated
GARD5404Evalidated

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.

Codes that Orphanet moved or referred to this one:

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PADI3Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:18337ENSG000001426196067551p36.13peptidyl arginine deiminase 327866708[PMID]
TGM3Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:11779ENSG0000012578060023820p13transglutaminase 327866708[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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

6 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001595Abnormality of the hair
HP:0002208Coarse hair
HP:0002552Trichodysplasia
HP:0011364White hair
HP:0002224Woolly hair
Occasional (29-5%)
HP:0002232Patchy alopecia

Run the differential on the 5 obligate / very frequent terms

7

Sources for this card