raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:727881

Medullary tegmental cap dysplasia

Synonyms: MTCD

Type
Morphological anomaly
Group
Disorder
Inheritance
Unknown
Age of onset
Antenatal, Neonatal
Status
active

A rare syndrome with a brainstem malformation as a major feature characterized by an abnormal mass, also called cap, of different shape and size, protruding from the posterior medullary surface. Patients may present a variable phenotype ranging from normal neurodevelopment to profound developmental delay, as well as variable neurologic manifestations such as hypotonia, strabismus, nystagmus, absent eye contact and hyperkinetic movements. Sometimes, extracerebral anomalies are observed such as cutaneous lesions, respiratory problems, hematologic and hepatic disorders.

1

Names in Orphadata languages

9 of 12 languages
LangNameSynonyms
enMedullary tegmental cap dysplasiaMTCD
frDysplasie tegmentale de la moelle allongéeDysplasie du tegmetum de la moelle allongée · Dysplasie tegmentale médullaire
deMedulläre tegmentale Capdysplasie= en
esDisplasia del casquete tegmental bulbar= en
itDisplasia del tegmento midollare= en
nlMedullaire tegmentale kap-dysplasie= en
ptMedullary tegmental cap dysplasia
plMedullary tegmental cap dysplasia= en
csMedullary tegmental cap dysplasia= en
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Cross-references

qualifier = Orphanet mapping relation

No cross-references in this release.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families27 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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

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

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Sources for this card