raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:634461

Mosaic neurofibromatosis type 1

Synonyms: MNF1 · Mosaic NF1

Type
Disease
Group
Disorder
Inheritance
Unknown
Age of onset
Infancy, Neonatal
Status
active

A rare mosaic form of neurofibromatosis type 1 (NF1) characterized by findings typical of NF1, namely multiple café-au-lait macules (CALMs), cutaneous neurofibromas, skinfold freckling/lentiginous macules, iris Lisch nodules and tumors of the nervous system. Mosaic form is caused by postzygotic pathogenic variants in NF1-gene. In mosaic NF1 the allelic/tissue distribution of the pathogenic NF1-variant clearly suggests mosaicsm and/or the distribution of CALMs and cutaneous neurofibromas is segmental. The phenotype can be milder than in NF1.

1

Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enMosaic neurofibromatosis type 1MNF1 · Mosaic NF1
frNeurofibromatose type 1 mosaïqueNeurofibromatose 1 mosaïque · NF1 mosaïque
deMosaik-Neurofibromatose Typ 1MNF1 · Mosaik-NF1
esNeurofibromatosis tipo 1 en mosaicoMNF1 · NF1 en mosaico
itNeurofibromatosi in mosaico tipo 1MNF1 · NF1 in mosaico
nlMozaïek neurofibromatose type 1MNF1 · Mozaïek NF1
ptNeurofibromatose em mosaico tipo 1MNF1 · NF1 em mosaico
plMozaikowa postać neurofibromatozy typu 1= en
csMozaiková neurofibromatóza, typ 1= en
ukМозаїчний нейрофіброматоз, тип 1MNF1 · Мозаїчний NF1

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q85.0NTBTattributedvalidated
ICD-11LD2D.1YNTBTattributedvalidated
MONDO0859763Evalidated
UMLSC5782097Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
NF1Disease-causing germline mutation(s) inAssessedHGNC:7765ENSG0000019671261311317q11.2neurofibromin 134012067[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidated20301288[PMID]_29215653[PMID]
Point prevalence1-5 / 10 00024.4618 / 100 000FinlandValue and classValidated29215653[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

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

7

Sources for this card