raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:96168

Monosomy 13q34 syndrome

Synonyms: Del(13)(q34) · Distal deletion 13q34 · Subtelomeric deletion 13q34

Type
Malformation syndrome
Group
Disorder
Inheritance
Not applicable
Age of onset
Antenatal, Neonatal
Status
active

Monosomy 13q34 is a rare chromosomal anomaly syndrome, resulting from the partial deletion of the long arm of chromosome 13, principally characterized by global developmental delay, mild intellectual disability, obesity and mild craniofacial dysmorphism (microcephaly, wide rectangular forehead, downslanting palpebral fissures, mild ptosis, prominent nose with long nasal bridge and broad tip, small chin). Other variable reported features include congenital heart defects, hand and foot anomalies (e.g. polydactyly) and agenesis of the corpus callosum.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMonosomy 13q34 syndromeDel(13)(q34) · Distal deletion 13q34 · Subtelomeric deletion 13q34
frSyndrome de monosomie 13q34Délétion subtélomérique 13q34 · Del(13)(q34) · Délétion distale 13q34
deMonosomie 13q34Del(13)(q34) · Deletion 13q34, distale · Subtelomere Deletion 13q34
esSíndrome de monosomía 13q34Del(13)(q34) · Deleción subtelomérica 13q34 · Deleción terminal 13q34
itSindrome monosomia 13q34Del(13)(q34) · Delezione 13q34 distale · Delezione 13q34 subtelomerica
nlMonosomie 13q34-syndroomDel(13)(q34) · Distale deletie 13q34 · Subtelomerische deletie 13q34
ptMonossomia 13q34
plZespół delecji 13q34Del(13)(q34) · Delecja dystalna 13q34 · Delecja subtelomerowa 13q34
csMonozomie 13q34Del(13)(q34) · Distální delece 13q34 · Subtelometická delece 13q34
ukМоносомія 13q34Del(13)(q34) · Дистальна делеція 13q34 · Субтеломерна делеція 13q34
zh13q34单体13q34端粒缺失
trMonozomi 13q34Del (13) (q34) · Distal delesyon 13q34 · Subtelomerik delesyon 13q34

Definition in:

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Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM619148Evalidated
ICD-10Q93.5NTBTattributedvalidated
ICD-11LD44.DNTBTindexvalidated
MONDO0019902Evalidated
UMLSC4707797Evalidated

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 (2):

No children.

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Genes

0 direct

Orphanet records no gene directly on this code.

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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birthUnknown—WorldwideClass onlyValidatedORPHANET
Point prevalenceUnknown—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

35 annotations · validated 2017-01-16
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001999Abnormal facial shape
HP:0001263Global developmental delay
HP:0001510Growth delay
HP:0001256Intellectual disability, mild
HP:0001513Obesity
Frequent (79-30%)
HP:0003256Abnormality of the coagulation cascade
HP:0000337Broad forehead
HP:0000455Broad nasal tip
HP:0000494Downslanted palpebral fissures
HP:0000316Hypertelorism
HP:0000252Microcephaly
HP:0000426Prominent nasal bridge
HP:0000448Prominent nose
Occasional (29-5%)
HP:0000363Abnormality of earlobe
HP:0011565Common atrium
HP:0000286Epicanthus
HP:0000421Epistaxis
HP:0010945Fetal pyelectasis
HP:0002573Hematochezia
HP:0001397Hepatic steatosis
HP:0011228Horizontal eyebrow
HP:0000855Insulin resistance
HP:0100608Metrorrhagia
HP:0000347Micrognathia
HP:0001763Pes planus
HP:0000358Posteriorly rotated ears
HP:0003645Prolonged partial thromboplastin time
HP:0008151Prolonged prothrombin time
HP:0001642Pulmonic stenosis
Very rare (<4-1%)
HP:0001274Agenesis of corpus callosum
HP:0003072Hypercalcemia
HP:0032152Keratosis pilaris
HP:0040188Osteochondrosis
HP:0001830Postaxial foot polydactyly
HP:0001162Postaxial hand polydactyly

Run the differential on the 5 obligate / very frequent terms

Annotation source: 27067448[PMID]_26012727[PMID]_26645620[PMID]_22847911[PMID]_21595000[PMID]_21199766[PMID]_19610112[PMID]_18162117[PMID]

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Sources for this card