raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:369881

2p21 microdeletion syndrome without cystinuria

Synonyms: Del(2)(p21) without cystinuria

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

2p21 microdeletion syndrome without cystinuria is a rare partial autosomal monosomy characterized by weak fetal movements, severe infantile hypotonia and feeding difficulties that spontaneously improve with time, urogenital abnormalities (hypospadias or hypoplastic labia majora), global development delay, mild intellectual disability and facial dysmorphism (dolichocephaly, frontal bossing, bilateral ptosis, midface retrusion, open mouth with tented upper lip vermilion). Affected individuals have borderline elevated serum lactate but no cystinuria.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en2p21 microdeletion syndrome without cystinuriaDel(2)(p21) without cystinuria
frSyndrome de microdélétion 2p21 sans cystinurieDel(2)(p21) sans cystinurie
de2p21-Mikrodeletionssyndrom ohne CystinurieDel(2)(p21) ohne Cystinurie
esSíndrome de microdeleción 2p21 sin cistinuriaDel(2)(p21) sin cistinuria
itSindrome da microdelezione 2p21 senza cistinuriaDel(2)(p21) senza cistinuria
nl2p21-microdeletiesyndroom zonder cystinurieDel(2)(p21) zonder cystinurie
ptSíndrome de microdeleção 2p21 sem cistinúria
plZespół mikrodelecji 2p21 bez cystynuriiDel(2)(p21) bez cystynurii
csMikrodeleční syndrom 2p21 bez cystinurieDel(2)(p21) bez cystinurie
ukСиндром мікроделеції 2р21 без цистинуріїDel(2)(p21) без цистинурії
zh2p21微缺失综合征不伴胱氨酸尿2p21缺失不伴胱氨酸尿
trSistinüri olmayan 2p21 mikrodelesyon sendromuDel (2) (p21) sistinüri ile seyretmeyen

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q93.5NTBTattributedvalidated
MONDO0018245Evalidated
UMLSC4749458Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CAMKMTRole in the phenotype ofAssessedHGNC:26276ENSG000001439196095592p21calmodulin-lysine N-methyltransferase23794250[PMID]
PREPLRole in the phenotype ofAssessedHGNC:30228ENSG000001380786095572p21prolyl endopeptidase like23794250[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated23794250[PMID]
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