raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3344

Weismann-Netter syndrome

Synonyms: Anterior bowing of legs with dwarfism · Toxopachyosteose diaphysaire tibio-peroniere · WNS · Weismann-Netter-Stuhl syndrome

Type
Malformation syndrome
Group
Disorder
Age of onset
Neonatal
Status
active

Weismann-Netter syndrome is a rare, genetic, primary, bent bone dysplasia characterized by anterior diaphyseal bowing of the tibia and fibula, broadening of the fibula, posterior cortical thickening of both bones and short stature. Additional skeletal abnormalities include scoliosis with marked lumbar lordosis, horizontal sacrum and square iliac wings and/or, less frequently, vertebral malformations, abnormal shape of the clavicles and ribs, calvarial hyperostosis and delayed eruption of permanent teeth. Delayed ambulation is also frequently associated.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enWeismann-Netter syndromeAnterior bowing of legs with dwarfism · Toxopachyosteose diaphysaire tibio-peroniere · WNS · Weismann-Netter-Stuhl syndrome
frSyndrome de Weismann-Netter-StuhlToxopachyostéose diaphysaire tibio-péronière · WNS
deWeismann-Netter-SyndromAnteriore Verkrümmung der Beine mit Kleinwuchs · Toxopachyostose, tibioperoneale diaphysäre · WNS · Weismann-Netter-Stuhl-Syndrom
esSíndrome de Weismann-NetterArqueamiento anterior de las piernas con enanismo · Síndrome de Weismann-Netter-Stuhl · Toxopaquiosteosis diafisaria tibioperonea · WNS
itSindrome di Weismann-NetterIncurvamento anteriore delle gambe con nanismo · Sindrome di Weismann-Netter-Stuhl · WNS
nlSyndroom van Weismann-NetterAnterieure kromming van benen met dwerggroei · Syndroom van Weismann-Netter-Stuhl · Toxopachyosteose diaphysaire tibio-peroniere · WNS
ptSíndrome Weismann-NetterEncurvamento anterior das pernas com nanismo · Síndrome Weismann-Netter-Stuhl · Toxopaquiosteose diafisária tibio-peroneal · WNS
plZespół Weismanna i Nettera= en
csWeismann-Netterův syndrom= en
ukСиндром Вайсмана-НеттераПереднє згинання ніг при карликовості · Токсопахіостеоїдний діафізарний тибіопероніт · Синдром Вайсмана-Неттера-Штуля · WNS
zhWeismann-Netter 综合征腿前弓伴侏儒
trWeismann-Netter sendromuWNS · Weismann-Netter-Stuhl sendromu · Cücelik ile seyreden bacakların öne eğilmesi

Definition in:

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Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM112350Evalidated
ICD-10Q77.8NTBTattributedvalidated
ICD-11LD24.CNTBTindexvalidated
MONDO0007209Evalidated
MeSHC537082Evalidated
UMLSC1862172Evalidated
GARD5232Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

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Genes

0 direct

Orphanet records no gene directly on this code.

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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families100 casesWorldwideCase(s)Validated19839038[PMID]
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET_19839038[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

20 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003103Abnormal cortical bone morphology
HP:0002991Abnormal fibula morphology
HP:0002992Abnormality of tibia morphology
HP:0006487Bowing of the long bones
HP:0010502Fibular bowing
HP:0003510Severe short stature
HP:0002982Tibial bowing
Frequent (79-30%)
HP:0003312Abnormal form of the vertebral bodies
HP:0002823Abnormality of femur morphology
HP:0003272Abnormality of the hip bone
HP:0002980Femoral bowing
HP:0001249Intellectual disability
HP:0002808Kyphosis
HP:0002650Scoliosis
HP:0003177Squared iliac bones
Occasional (29-5%)
HP:0031095Abnormal humerus morphology
HP:0040071Abnormal morphology of ulna
HP:0000820Abnormality of the thyroid gland
HP:0001903Anemia
HP:0006501Aplasia/Hypoplasia of the radius

Run the differential on the 7 obligate / very frequent terms

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Sources for this card