raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:502318

Cochlear nerve deficiency

Type
Morphological anomaly
Group
Disorder
Inheritance
Not applicable
Age of onset
Neonatal
Status
active

A rare otorhinolaryngological malformation characterized by a hypoplastic or absent cochlear nerve, resulting in variable hearing loss or total deafness, depending on the quantity of nerve fibers present. The condition can be unilateral or bilateral, occur as an isolated malformation or in the context of a complex syndrome, and may be associated with a hypoplastic internal auditory or cochlear nerve canal.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCochlear nerve deficiency
frDysplasie du nerf cochléaire
deHypo-/Aplasie des Nervus cochlearisDefizienz des Hörnerven
esDeficiencia del nervio coclear
itDeficit del nervo cocleare
nlDeficiëntie van nervus cochlearis
ptDeficiência do nervo coclear
plNiedorozwój nerwu ślimakowego
csDeficit kochleárního nervu
ukНедостатність кохлеарного нерва
zh耳蜗神经缺损
trKoklear sinir eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10H93.3NTBTattributedvalidated
ICD-11AB72.YNTBTattributedvalidated
MONDO0034733Evalidated
UMLSC5568535Evalidated

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.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

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

7

Sources for this card