raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:420402

Semicircular canal dehiscence syndrome

Synonyms: SCD syndrome

Type
Clinical syndrome
Group
Disorder
Inheritance
Not applicable
Age of onset
All ages
Status
active

A rare otorhinolaryngologic disease characterized by the uni- or bilateral dehiscence of the bone(s) overlying the superior (most common), lateral or posterior semicircular canal(s). Patients present audiological (autophony, aural fullness, conductive hearing loss, pulsatile tinnitus) and/or vestibular symptoms (sound or pressure-evoked oscillopsia or vertigo, characteristic vertical-torsional eye movements), depending on which semicircular canal is affected. Posterior SCD syndrome is associated with high-riding jugular bulb and fibrous dysplasia, while lateral SCD syndrome is associated with chronic otitis media and cholesteatoma, with or without audiological and vestibular symptoms.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSemicircular canal dehiscence syndromeSCD syndrome
frSyndrome de déhiscence du canal semi-circulaire
deBogengangsdehiszenz-SyndromSCD-Syndrom
esSíndrome de dehiscencia del canal semicircularSíndrome DCS
itSindrome da deiscenza del canale semicircolareSindrome SCD
nlDehiscentie van canalis semicircularis-syndroom'Semicircular canal deshiscence'-syndroom · SCD-syndroom
ptSíndrome de deiscência do canal semicircularSíndrome SCD
plZespół przetoki kanału półkolistegoZespół SCD · Zespół rozejścia się kanału półkolistego
csSyndrom dehiscence semicirkulárního kanálku= en
ukСиндром дегісценції півколового каналуСиндром SCD
zh半规管裂隙综合征SCD综合征
trSemisirküler kanal dehissansı sendromuSCD sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10H83.8NTBTattributedvalidated
ICD-11AB31.3BTNTattributedvalidated
MONDO0018484Evalidated
MeSHD000084322Evalidated
UMLSC4708600Evalidated

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.

4

Genes

0 direct

Orphanet records no gene directly on this code.

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

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

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Sources for this card