raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:238523

Atypical hypotonia-cystinuria syndrome

Synonyms: Atypical HCS

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

A form of hypotonia-cystinuria type 1 syndrome characterized by mild to moderate intellectual disability in addition to classic hypotonia-cystinuria syndrome phenotype (cystinuria type 1, generalised hypotonia, poor feeding, growth retardation, and minor facial dysmorphism).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtypical hypotonia-cystinuria syndromeAtypical HCS
frSyndrome d'hypotonie-cystinurie atypiqueHCS atypique
deAtypische Hypotonie-Cystinurie-SyndromHCS, atypisch
esSíndrome de hipotonía-cistinuria atípicoHCS atípico
itSindrome ipotomia e cistinuria atipicaHCS atipica
nlAtypisch hypotonie - cystinurie-syndroomAtypisch HCS
ptHipotonia atípica - síndrome de cistinúria
plAtypowy zespół hipotonia - cystynuriaAtypowy HCS
csAtypický syndrom hypotonie a cystinurieAtypický HCS
ukСиндром атипової гіпотонії-цистинуріїАтиповий HCS
zh非典型肌张力低下-胱氨酸尿症综合征非典型HCS
trAtipik hipotoni-sistinüri sendromuAtipik HCS

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM606407NTBTvalidated
ICD-10E72.0NTBTattributedvalidated
ICD-11GB90.40NTBTindexvalidated
MONDO0016539Evalidated
UMLSC4755274Evalidated

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

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CAMKMTRole in the phenotype ofAssessedHGNC:26276ENSG000001439196095592p21calmodulin-lysine N-methyltransferase18234729[PMID]
PREPLRole in the phenotype ofAssessedHGNC:30228ENSG000001380786095572p21prolyl endopeptidase like18234729[PMID]
SLC3A1Role in the phenotype ofAssessedHGNC:11025ENSG000001380791046142p21solute carrier family 3 member 118234729[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated18234729[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_18234729[PMID]

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