raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:94089

Pseudohypoparathyroidism type 1B

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Not applicable
Age of onset
Adolescent, Childhood, Infancy, Neonatal
Status
active

Pseudohypoparathyroidism type 1B (PHP-1b) is a type of pseudohypoparathyroidism (PHP) characterized by localized resistance to parathyroid hormone (PTH) mainly in the renal tissues which manifests with hypocalcemia, hyperphosphatemia and elevated PTH levels. About 60-70% of patients also present with elevated TSH levels due to TSH resistance.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPseudohypoparathyroidism type 1B
frPseudohypoparathyroïdie type 1B
dePseudohypoparathyreoidismus Typ 1B
esPseudohipoparatiroidismo tipo 1B
itPseudoipoparatiroidismo tipo 1B
nlPseudohypoparathyreoïdie type 1B
ptPseudohipoparatiroidismo tipo 1B
plRzekoma niedoczynność przytarczyc typu 1B
csPseudohypoparatyreóza, typ 1B
ukПсевдогіпопаратиреоз, тип 1B
zh假性甲状旁腺功能减退症1B型
trPsödohipoparatiroidizm tip 1B

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM603233Evalidated
ICD-10E20.1NTBTattributedvalidated
ICD-115A50.1NTBTindexvalidated
MONDO0011301Evalidated
MeSHC548075Evalidated
UMLSC1864100Evalidated
GARD10680Evalidated

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

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
GNASDisease-causing germline mutation(s) inAssessedHGNC:4392ENSG0000008746013932020q13.32GNAS complex locus
STX16Disease-causing germline mutation(s) inAssessedHGNC:11431ENSG0000012422260366620q13.32syntaxin 16
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—EuropeClass 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

39 annotations · validated 2017-03-08
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0000852Pseudohypoparathyroidism
Very frequent (99-80%)
HP:0003165Elevated circulating parathyroid hormone level
HP:0002905Hyperphosphatemia
HP:0002901Hypocalcemia
HP:0003456Low urinary cyclic AMP response to PTH administration
Frequent (79-30%)
HP:0000518Cataract
HP:0000684Delayed eruption of teeth
HP:0005280Depressed nasal bridge
HP:0006297Enamel hypoplasia
HP:0000293Full cheeks
HP:0000639Nystagmus
HP:0000311Round face
HP:0000470Short neck
HP:0004322Short stature
Occasional (29-5%)
HP:0011458Abdominal symptom
HP:0000739Anxiety
HP:0100749Chest pain
HP:0000509Conjunctivitis
HP:0003909Cortical subperiosteal resorption of humeral metaphyses
HP:0000716Depression
HP:0003034Diaphyseal sclerosis
HP:0100660Dyskinesia
HP:0002094Dyspnea
HP:0003472Hypocalcemic tetany
HP:0001265Hyporeflexia
HP:0005700Increased bone density with cystic changes
HP:0011001Increased bone mineral density
HP:0000737Irritability
HP:0012049Laryngeal dystonia
HP:0003394Muscle spasm
HP:0003739Myoclonic spasms
HP:0003401Paresthesia
HP:0001657Prolonged QT interval
Very rare (<4-1%)
HP:0000824Decreased response to growth hormone stimulation test
HP:0002199Hypocalcemic seizures
HP:0008227Pituitary resistance to thyroid hormone
Excluded (0%)
HP:0030057Autoimmune antibody positivity
HP:0003761Calcinosis
HP:0010766Ectopic calcification

Run the differential on the 5 obligate / very frequent terms

Annotation source: 21816789[PMID]_2109828[PMID]_9506735[PMID]_10700702[PMID]_2848415[PMID]_10478236[PMID]_20610593[PMID]_20719837[PMID]_21525160[PMID]_24684469[PMID]_11834431[PMID]_24030943[PMID]_26160136[PMID]_8427051[PMID]_18650515[PMID]_18535072[PMID]_11067869[PMID]

7

Sources for this card