raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:66628

Obesity due to congenital leptin deficiency

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

Congenital leptin deficiency is a form of monogenic obesity characterised by severe early-onset obesity and marked hyperphagia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enObesity due to congenital leptin deficiency
frObésité par déficit congénital en leptine
deAdipositas durch angeborenen LeptinmangelLeptinmangel, kongenitaler
esObesidad por deficiencia congénita de leptina
itObesità da deficit congenito di leptina
nlObesitas door congenitale deficiëntie van leptine
ptObesidade por deficiência de leptina congénita
plOtyłość spowodowana wrodzonym niedoborem leptyny
csObezita způsobená vrozeným nedostatkem leptinu
ukОжиріння через вроджений дефіцит лептину
zh先天性瘦素缺乏所致肥胖症
trLetal leptin eksikliğine bağlı obezite

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM614962Evalidated
ICD-10E66.8NTBTattributedvalidated
ICD-115B81.YNTBTindexvalidated
MONDO0013991Evalidated
UMLSC3554224Evalidated
GARD13015Evalidated

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
LEPDisease-causing germline mutation(s) inAssessedHGNC:6553ENSG000001746971641607q32.1leptin26567097[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families30 casesWorldwideCase(s)ValidatedORPHANET
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

20 annotations · validated 2017-02-20
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0003292Decreased serum leptin
HP:0001513Obesity
Very frequent (99-80%)
HP:0008187Absence of secondary sex characteristics
HP:0005419Decreased T cell activation
HP:0032218Decreased proportion of CD4-positive T cells
HP:0008214Decreased serum estradiol
HP:0040171Decreased serum testosterone concentration
HP:0008734Decreased testicular size
HP:0000771Gynecomastia
HP:0000815Hypergonadotropic hypogonadism
HP:0000842Hyperinsulinemia
HP:0008724Hypoplasia of the ovary
HP:0002591Polyphagia
HP:0000786Primary amenorrhea
Frequent (79-30%)
HP:0005616Accelerated skeletal maturation
HP:0002155Hypertriglyceridemia
HP:0000831Insulin-resistant diabetes mellitus
HP:0004926Orthostatic hypotension due to autonomic dysfunction
HP:0008245Pituitary hypothyroidism
HP:0002788Recurrent upper respiratory tract infections

Run the differential on the 12 obligate / very frequent terms

Annotation source: 10486419[PMID]_9202122[PMID]

7

Sources for this card