raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:79144

Isolated congenital onychodysplasia

Synonyms: COIF · COIF syndrome · Congenital onychodysplasia of the index fingers · Iso-Kikuchi syndrome

Type
Disease
Group
Disorder
Age of onset
Neonatal
Status
active

A rare isolated nail anomaly characterized by congenital unilateral or bilateral nail dysplasia (including micronychia, polyonychia, anonychia, hemionychrogryphosis, and malalignment) commonly involving the index fingers and/or other fingers or also toes, frequently associated with bony anomalies of the affected digits (such as Y-shaped bifurcation of the distal phalanx, brachymesophalangy, or syndactyly). The condition can be sporadic or familial.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIsolated congenital onychodysplasiaCOIF · COIF syndrome · Congenital onychodysplasia of the index fingers · Iso-Kikuchi syndrome
frOnychodysplasie congénitale isoléeOnychodysplasie congénitale des index · Syndrome d'Iso-Kikuchi
deOnychodysplasie, kongenitale isolierteCOIF · COIF-Syndrom · Iso-Kikuchi-Syndrom · Onychodysplasie des Zeigefingers, kongenitale · Onychodysplasie des Zeigefingers, kongenitale (COIF)
esOnicodisplasia congénita aisladaCOIF · Onicodisplasia congénita de los dedos índices · Síndrome COIF · Síndrome de Iso-Kikuchi
itOnicodisplasia isolata congenitaOnicodisplasia congenita del dito indice · Sindrome COIF · Sindrome di Iso-Kikuchi
nlGeïsoleerde congenitale onychodysplasieCOIF · COIF-syndroom · Congenitale onychodysplasie van de wijsvingers · Syndroom van Iso-Kikuchi
ptOnicodisplasia congénitaOnicodisplasia congénita dos dedos indicadores · Síndrome COIF · Síndrome de Iso-Kikuchi
plWrodzona dysplazja paznokciCOIF · Wrodzona dysplazja paznokci palców wskazująych · Zespół COIF · Zespół Iso i Kikuchi
csVrozená onychodysplázieCOIF · COIF syndrom · Isov-Kukuchiho syndrom · Vrozená onychodysplázie postihující ukazováčky
ukІзольована вроджена оніходисплазіяCOIF · Синдром COIF · Вроджена оніходисплазія вказівних пальців · Синдром Ізо-Кікучі
zh孤立型先天性甲发育不良先天性食指指甲发育异常
trİzole doğumsal onikodisplaziCOIF · COIF sendromu · Iso-Kikuchi sendromu · İşaret parmaklarının Doğumsal onikodisplazisi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM605779Evalidated
ICD-10Q84.6NTBTattributedvalidated
ICD-11EC22.0NTBTindexvalidated
MONDO0011595Evalidated
UMLSC1274658Evalidated
GARD9761Evalidated

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.

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Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET_26509026[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

22 annotations · validated 2021-01-28
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0030805Absent lunula
HP:0010793Bifid nail
HP:0100798Fingernail dysplasia
HP:0001816Thin nail
HP:0100797Toenail dysplasia
Frequent (79-30%)
HP:0005918Abnormal finger phalanx morphology
HP:0001598Concave nail
HP:0031282Malalignment of the great toenail
HP:0011313Narrow nail
HP:0040036Onychogryposis of fingernail
HP:0008401Onychogryposis of toenails
HP:0009951Partial duplication of the distal phalanx of the 2nd finger
HP:0030803Platonychia
HP:0001792Small nail
Occasional (29-5%)
HP:0001798Anonychia
HP:0012710Ingrown nail
HP:0012203Onychomycosis
Very rare (<4-1%)
HP:00046912-3 toe syndactyly
HP:0001385Hip dysplasia
HP:0000202Orofacial cleft
HP:0002650Scoliosis
HP:0012296Slender distal phalanx of finger

Run the differential on the 5 obligate / very frequent terms

Annotation source: 31685224[PMID]_26131880[PMID]_11030770[PMID]

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Sources for this card