raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:658813

Combined immunodeficiency-megaloblastic anemia due to methylenetetrahydrofolate dehydrogenase 1 deficiency

Synonyms: CIMAH · Combined immunodeficiency-megaloblastic anemia with or without hyperhomocysteinemia · Methylenetetrahydrofolate dehydrogenase 1 deficiency

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy
Status
active

Orphadata ships no English definition for this code.

1

Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enCombined immunodeficiency-megaloblastic anemia due to methylenetetrahydrofolate dehydrogenase 1 deficiencyCIMAH · Combined immunodeficiency-megaloblastic anemia with or without hyperhomocysteinemia · Methylenetetrahydrofolate dehydrogenase 1 deficiency
frDéficit immunitaire combiné-anémie mégaloblastique par déficit en méthylènetétrahydrofolate déshydrogénase 1Déficit en méthylènetétrahydrofolate déhydrogénase 1 · Déficit immunitaire combiné et anémie mégaloblastique avec ou sans hyperhomocystéinémie
deKombinierter Immundefekt mit megaloblastischer Anämie durch Methylentetrahydrofolat-Dehydrogenase-1-MangelCIMAH · Kombinierte Immundefizienz-megaloblastische Anämie mit oder ohne Hyperhomocysteinämie · Methylentetrahydrofolat-Dehydrogenase-1-Mangel
esInmunodeficiencia combinada-anemia megaloblástica por deficiencia de metilentetrahidrofolato deshidrogenasa 1CIMAH · Deficiencia de metilentetrahidrofolato deshidrogenasa 1 · Inmunodeficiencia combinada-anemia megaloblástica con o sin hiperhomocisteinemia
itImmunodeficienza combinata-anemia megaloblastica da deficit di metilenetetraidrofolato deidrogenasi 1CIMAH · Deficit di metilenetetraidrofolato deidrogenasi 1 · Immunodeficienza combinata-anemia megaloblastica con o senza iperomocisteinemia
nlGecombineerde immuundeficiëntie - megaloblastische anemie door deficiëntie van methyleentetrahydrofolaat-dehydrogenase 1CIMAH · Deficiëntie van methyleentetrahydrofolaat-dehydrogenase 1 · Gecombineerde immuundeficiëntie - megaloblastaire anemie door deficiëntie van methyleentetrahydrofolaat-dehydrogenase 1 · Gecombineerde immuundeficiëntie - megaloblastaire anemie met of zonder hyperhomocysteïnemie
ptImunodeficiência combinada-anemia megaloblástica por deficiência de metilenotetrahidrofolato desidrogenase 1CIMAH · Deficiência de metilenotetrahidrofolato desidrogenase 1 · Imunodeficiência combinada-anemia megaloblástica com ou sem hiperhomocisteinemia
plNiedobór dehydrogenazy metylenotetrahydrofolianowej 1Skojarzony niedobór odporności I anemia megaloblastyczna wskutek niedoboru dehydrogenazy metylenotetrahydrofolianu 1
csDeficit metylentetrahydrofolátdehydrogenázy 1= en
ukКомбінована імунодефіцитно-мегалобластна анемія, зумовлена дефіцитом метилентетрагідрофолатдегідрогенази 1CIMAH · Комбінована імунодефіцитно-мегалобластна анемія з гіпергомоцистеїнемією або без неї · Дефіцит метилентетрагідрофолатрегідрогенази 1
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM617780Evalidated
ICD-10E88.8NTBTattributedvalidated
ICD-115C63.1NTBTattributedvalidated
MONDO0060611Evalidated
MONDO60611Evalidated
UMLSC4540434Evalidated

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 (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MTHFD1Disease-causing germline mutation(s) inAssessedHGNC:7432ENSG0000010071417246014q23.3methylenetetrahydrofolate dehydrogenase, cyclohydrolase and formyltetrahydrofolate synthetase 121813566[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families8 casesWorldwideCase(s)Validated21813566[PMID]_25633902[PMID]_27707659[PMID]_32414565[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated21813566[PMID]_25633902[PMID]_27707659[PMID]_32414565[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