raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:329249

Severe early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency

Type
Etiological subtype
Group
Subtype of disorder
Inheritance
Autosomal dominant
Age of onset
Childhood
Status
active

A rare, genetic form of obesity characterized by severe early-onset obesity, hyperphagia, insulin resistance with hyperinsulinemia, reduced adult final height, delayed speech and language development and a tendency for social isolation and aggressive behavior.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSevere early-onset obesity-insulin resistance syndrome due to SH2B1 deficiency
frObésité sévère précoce avec résistance à l'insuline par déficit en SH2B1
deSchwere früh-beginnende Adipositas mit Insulin-Resistenz-Syndrom durch SH2B1-Mangel
esSíndrome grave de resistencia a insulina-obesidad por deficiencia de SH2B1 de inicio precoz
itSindrome da obesità grave ad esordio precoce e insulino-resistenza da deficit di SH2B1
nlErnstig obesitas-insulineresistentiesyndroom door SH2B1-deficiëntie met vroege aanvang
ptSíndrome de obesidade-resistência à insulina grave de início precoce por deficiência de SH2B1
plZespół ciężka otyłość o wczesnym początku z insulinoopornością spowodowany niedoborem SH2B1
csSyndrom zahrnující těžkou obezitu s časným začátkem a inzulinovou rezistenci, způsobený SH2B1 deficitem
ukТяжкий синдром раннього ожиріння та інсулінорезистентності, зумовлений дефіцитом SH2B1
zhSH2B1基因缺陷引起的严重早发性肥胖-胰岛素抵抗综合征
trSH2B1 eksikliğine bağlı ağır erken başlangıçlı obezite-insülin direnci sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10E66.8NTBTattributedvalidated
ICD-115B81.YNTBTattributedvalidated
MONDO0017994Evalidated
UMLSC5190989Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SH2B1Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:30417ENSG0000017818860893716p11.2SH2B adaptor protein 123160192[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families13 casesWorldwideCase(s)Validated23160192[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_23160192[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

11 annotations · validated 2016-04-18
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000842Hyperinsulinemia
HP:0001513Obesity
HP:0002591Polyphagia
HP:0012760Reduced social responsiveness
HP:0004322Short stature
Frequent (79-30%)
HP:0000718Aggressive behavior
HP:0000750Delayed speech and language development
HP:0008763No social interaction
Excluded (0%)
HP:0002910Elevated circulating hepatic transaminase concentration
HP:0003074Hyperglycemia
HP:0003077Hyperlipidemia

Run the differential on the 5 obligate / very frequent terms

Annotation source: 20808231[PMID]_24971614[PMID]_23160192[PMID]

7

Sources for this card