raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:645383

True myelomeningocele

Synonyms: True MMC

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Unknown
Status
active

A rare open neural tube defect characterized by no other malformation than myelomeningocele (spina bifida with a neural placode exposed at the top of a non-epidermised dysplasic meninges sac and Chiari II malformation).

1

Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enTrue myelomeningoceleTrue MMC
frMyéloméningocèle vraiMMC vrai
deEchte MyelomeningozeleEchte MMC
esMielomeningocele verdaderoMMC verdadero
itMielomeningocele veroMMC vero
nlWare myelomeningoceleWare MMC
ptMielomeningocelo verdadeiroMMC verdadeiro
plPrawdziwa przepuklina oponowo-rdzeniowa= en
csPravá myelomeningokéla= en
ukІстинне мієломенінгоцелеСправжній MMC

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
MONDO0957453Evalidated
UMLSC5816713Evalidated

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