raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:268162

Intermediate maple syrup urine disease

Synonyms: Intermediate BCKD deficiency · Intermediate MSUD · Intermediate branched-chain alpha-ketoacid dehydrogenase deficiency

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

Intermediate maple syrup urine disease (intermediate MSUD) is a milder form of MSUD characterized by persistently raised branched-chain amino acids (BCAAs) and ketoacids, but fewer or no acute episodes of decompensation.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIntermediate maple syrup urine diseaseIntermediate BCKD deficiency · Intermediate MSUD · Intermediate branched-chain alpha-ketoacid dehydrogenase deficiency
frMaladie des urines sirop d'érable, forme intermédiaireMSUD intermédiaire · Maladie des urines à odeur de sirop d'érable, forme intermédiaire · Cétoacidurie à chaînes ramifiées intermédiaire · Déficit en BCKD, forme intermédiaire · Déficit en complexe de la déshydrogénase des alpha-cétoacides à chaîne ramifiée, forme intermédiaire · Leucinose intermédiaire
deAhornsirup-Krankheit, intermediäreBCKD-Mangel, intermediärer · MSUD, intermediär · Verzweigtkettige alpha-Ketosäuredehydrogenase-Mangel, intermediär
esEnfermedad de la orina con olor a jarabe de arce intermediaDeficiencia de BCKD intermedia · Deficiencia de alfa-cetoácido deshidrogenasa de cadena ramificada intermedia · EOOJA intermedia · MSUD intermedia
itMalattia delle urine a sciroppo di acero intermediaDeficit della 2-chetoacido deidrogenasi a catena ramificata, tipo intermedio · Deficit intermedio di BCKD · MSUD intermedia
nlIntermediaire maple syrup urine diseaseDeficiëntie van intermediaire vertakte keten-alfa-ketozuurdehydrogenase · Intermediaire BCKD-deficiëntie · Intermediaire MSUD · Intermediaire ahornsiroopurineziekte · Intermediaire esdoornsiroopurineziekte
ptDoença da urina xarope de bordo intermédiaDeficiência de BCKD intermédia · Deficiência de desidrogenase dos alfa-cetoácidos de cadeia ramificada intermédia · MSUD intermédia
plPostać pośrednia choroby syropu klonowegoPośredni Niedobór BCKD · Pośredni Niedobór dehydrogenazy ketokwasów rozgałęzionych · Postać pośrednia MSUD
csStředně těžká leucinózaStředně těžká nemoc javorového sirupu · Středně těžký deficit BCKD · Středně těžká MSUD · Středně těžký deficit dehydrogenázy větvených 2-ketokyselin
ukПомірно виражена хвороба сечі кленового сиропуПроміжний дефіцит BCKD · Дефіцит альфа-кетокислотної дегідрогенази проміжного розгалуженого ланцюга · Проміжний MSUD
zh中度枫糖尿病中间型支链α酮酸脱氢酶缺乏症
trOrta düzey akçaağaç şurubu idrar hastalığıOrta düzey MSUD · Orta düzey BCKD eksikliği · Orta düzey dallı zincirli alfa-ketoasit dehidrojenaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM248600BTNTvalidated
OMIM615135BTNTvalidated
OMIM620698BTNTvalidated
OMIM620699BTNTvalidated
ICD-10E71.0NTBTattributedvalidated
ICD-115C50.D0NTBTindexvalidated
MONDO0017052Evalidated
UMLSC1621920Evalidated

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

4 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
BCKDHBDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:987ENSG000000831232486116q14.1branched chain keto acid dehydrogenase E1 subunit beta20301495[PMID]
DBTDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:2698ENSG000001379922486101p21.2dihydrolipoamide branched chain transacylase E220301495[PMID]
BCKDHADisease-causing germline mutation(s) inAssessedHGNC:986ENSG0000024809860834819q13.2branched chain keto acid dehydrogenase E1 subunit alpha20301495[PMID]
PPM1KDisease-causing germline mutation(s) inAssessedHGNC:25415ENSG000001636446110654q22.1protein phosphatase, Mg2+/Mn2+ dependent 1K23086801[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birthUnknown—WorldwideClass onlyValidatedORPHANET
Point prevalence1-9 / 1 000 000—EuropeClass onlyNot yet validatedORPHANET

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