raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:988

Tibial hemimelia-polysyndactyly-triphalangeal thumb syndrome

Synonyms: Absent tibia-polydactyly syndrome · Werner mesomelic spectrum

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant, Autosomal recessive
Age of onset
Antenatal, Neonatal
Status
active

Tibial hemimelia-polysyndactyly-triphalangeal thumb syndrome is a rare, genetic dysostosis syndrome, with marked inter- and intra-familial variation, typically characterized by triphalangeal thumbs, hand and/or foot polysyndactyly and/or absent/hypoplastic tibiae (associated with duplication of fibulae in some cases), although isolated triphalangeal thumbs have also been reported. It is often accompanied with remarkable short stature and additional features may include radio-ulnar synostosis and hand oligodactyly, as well as abnormal carpal and metatarsal bones.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enTibial hemimelia-polysyndactyly-triphalangeal thumb syndromeAbsent tibia-polydactyly syndrome · Werner mesomelic spectrum
frSyndrome d'hémimélie tibiale-polysyndactylie-pouce triphalangéSpectre mésomélique de Werner · Syndrome d'agénésie tibiale-polydactylie
deTibia-Hemimelie-Polysyndaktylie-triphalangealer Daumen-SyndromTibia-Agenesie-Polysyndaktylie-Syndrom · Tibia-Aplasie-Polysyndaktylie-Syndrom · Werner mesomeles Spektrum
esSíndrome de hemimelia tibial-polisindactilia-pulgar trifalángicoEspectro mesomélico de Werner · Síndrome de tibia ausente-polidactilia
itSindrome da emimelia tibiale - polisindattilia - pollici trifalangeiSindrome aplasia della tibia – polidattilia · Spettro mesomelico di Werner
nlHemimelie van tibia - polysyndactylie - trifalangeale duim-syndroomAfwezig scheenbeen - polydactylie-syndroom · Mesomeel spectrum van Werner
ptSíndrome de hemimélia tibial-polissindactilia-polegar trifalângicoEspectro mesomélico Werner · Síndrome de tíbia ausente-polidactilia
plBrak kości piszczelowej - polidaktyliaZespół hemimelii piszczelowej, polisyndaktylii i kciuka trójpaliczkowego
csSyndrom zahrnující hemimelii, polysyndaktylii a trifalangeální palec= en
ukСиндром великогомілкової гемімелії-полісиндактилії-трифалангового великого пальцяСиндром відсутності великогомілкової кістки-полідактилії · Вернерівський мезомелічний спектр
zh胫侧半肢畸形-多并指(趾)-拇指三节指骨综合征胫骨缺如-多指畸形综合征
trTibial hemimeli-polisindaktili-trifalanjiyal başparmak sendromuTibianın olmadığı polidaktili sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM188740NTBTvalidated
OMIM190605NTBTvalidated
ICD-10Q87.2NTBTattributedvalidated
MONDO0008572Evalidated
MONDO8572Evalidated
MeSHC535564Evalidated
UMLSC4707180Evalidated
GARD8309Evalidated

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.

Codes that Orphanet moved or referred to this one:

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
LMBR1Disease-causing germline mutation(s) inAssessedHGNC:13243ENSG000001059836055227q36.3limb development membrane protein 119847792[PMID]
SHHDisease-causing germline mutation(s) inAssessedHGNC:10848ENSG000001646906007257q36.3sonic hedgehog signaling molecule9600232[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families94 casesWorldwideCase(s)Validated10869115[PMID]_2333896[PMID]_39273297[PMID]_24965254[PMID]_24478176[PMID]_24777739[PMID]_2837505[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated10869115[PMID]_2333896[PMID]_39273297[PMID]_24965254[PMID]_24478176[PMID]_24777739[PMID]_2837505[PMID]_ORPHANET

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:0002991Abnormal fibula morphology
HP:0005772Aplasia/Hypoplasia of the tibia
HP:0006443Patellar aplasia
HP:0004322Short stature
Frequent (79-30%)
HP:0009601Aplasia/Hypoplasia of the thumb
HP:0005048Synostosis of carpal bones

Run the differential on the 4 obligate / very frequent terms

7

Sources for this card