raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:171829

6q16 microdeletion syndrome

Synonyms: Del(6)(q16) · Monosomy 6q16 · Prader-Willi-like syndrome due to microdeletion 6q16

Type
Disease
Group
Disorder
Inheritance
Unknown
Age of onset
Antenatal, Infancy, Neonatal
Status
active

A rare Prader-Willi like syndrome due to an interstitial deletion located at 6q16.1q16.2 and characterized by obesity, hyperphagia, hypotonia, small hands and feet, eye/vision anomalies, and global developmental delay.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en6q16 microdeletion syndromeDel(6)(q16) · Monosomy 6q16 · Prader-Willi-like syndrome due to microdeletion 6q16
frSyndrome de microdélétion 6q16Del(6)(q16) · Monosomie 6q16 · Syndrome de Prader-Willi-like dû à une microdélétion 6q16
deMikrodeletionssyndrom 6q16Del(6)(q16) · Monosomie 6q16 · Prader-Willi-ähnliches Syndrom durch Deletion 6q16
esSíndrome de microdeleción 6q16Del(6)(q16) · Monosomía 6q16 · Síndrome similar a Prader-Willi por microdeleción 6q16
itSindrome da delezione 6q16Del(6)(q16) · Monosomia 6q16 · Sindrome Prader-Willi-simile da delezione 6q16
nl6q16-microdeletiesyndroomDel(6)(q16) · Monosomie 6q16 · Prader-Willi-achtig syndroom door microdeletie 6q16
ptSíndrome de microdeleção 6q16
plZespół delecji 6q16Del(6)(q16) · Monosomia 6q16 · Zespół podobny do zespołu Pradera i Williego spowodowany delecją 6q16
csSyndrom delece 6q16Del(6)(q16) · Monozomie 6q16 · Prader-Willi-like syndrom způsobený delecí 6q16
ukСиндром мікроделеції 6q16Del(6)(q16) · Моносомія 6q16 · Синдром Прадера-Віллі внаслідок мікроделеції 6q16
zh6q16微缺失综合征6q16微缺失所致Prader-Willi样综合征
tr6q16 mikrodelesyon sendromuDel (6) (q16) · Monozomi 6q16 · Mikrodelesyon 6q16 ya bağlı Prader-Willi benzeri sendrom

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q93.5NTBTattributedvalidated
ICD-11LD29NTBTindexvalidated
MONDO0015749Evalidated
UMLSC5438727Evalidated

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
SIM1Role in the phenotype ofAssessedHGNC:10882ENSG000001122466031286q16.3SIM bHLH transcription factor 124038875[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families12 casesWorldwideCase(s)Validated24038875[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.

6

HPO phenotypes

32 annotations · validated 2020-10-23
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001999Abnormal facial shape
HP:0000750Delayed speech and language development
HP:0001263Global developmental delay
HP:0001513Obesity
Frequent (79-30%)
HP:0025160Abnormal temper tantrums
HP:0007874Almond-shaped palpebral fissure
HP:0000293Full cheeks
HP:0000256Macrocephaly
HP:0000341Narrow forehead
HP:0001319Neonatal hypotonia
HP:0002591Polyphagia
HP:0002033Poor suck
HP:0001328Specific learning disability
HP:0000486Strabismus
HP:0000582Upslanted palpebral fissure
Occasional (29-5%)
HP:0031703Abnormal ear morphology
HP:0000765Abnormal thorax morphology
HP:0000478Abnormality of the eye
HP:0000463Anteverted nares
HP:0000729Autistic behavior
HP:0000337Broad forehead
HP:0002136Broad-based gait
HP:0000414Bulbous nose
HP:0005280Depressed nasal bridge
HP:0001833Long foot
HP:0000369Low-set ears
HP:0000347Micrognathia
HP:0008551Microtia
HP:0002370Poor coordination
HP:0000278Retrognathia
HP:0001182Tapered finger
HP:0000574Thick eyebrow

Run the differential on the 4 obligate / very frequent terms

Annotation source: 18925680[PMID]_20301505[PMID]_16829351[PMID]

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Sources for this card