raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:171876

Generalized pseudohypoaldosteronism type 1

Synonyms: Autosomal recessive PHA1 · Autosomal recessive pseudohypoaldosteronism type 1 · Generalized PHA1

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A severe form of pseudohypoaldosteronism type 1 characterized by salt wasting in multiple organs including the kidney, colon, and sweat and salivary glands. Presentation is in the first few weeks of life with severe dehydration, vomiting and failure to thrive in association with hyponatremia, hyperkalemia and metabolic acidosis as well as elevated aldosterone and renin levels. No remission is reported and patients suffer from recurrent life-threatening episodes of salt loss.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enGeneralized pseudohypoaldosteronism type 1Autosomal recessive PHA1 · Autosomal recessive pseudohypoaldosteronism type 1 · Generalized PHA1
frPseudohypoaldostéronisme type 1 généraliséPHA1 autosomique récessif · PHA1 généralisé · Pseudohypoaldostéronisme type 1 autosomique récessif
dePseudohypoaldosteronismus, generalisierter, Typ 1Generalisierter PHA1 · Pseudohypoaldosteronismus, autosomal-rezessiver, Typ 1
esPseudohipoaldosteronismo generalizado tipo 1PHA1 autosómico recesivo · PHA1 generalizado · Pseudohipoaldosteronismo autosómico recesivo tipo 1
itPseudoipoaldosteronismo generalizzato tipo 1PHA1 autosomico recessivo · PHA1 generalizzato · Pseudoipoaldosteronismo autosomico recessivo tipo 1
nlGegeneraliseerd pseudohypoaldosteronisme type 1Autosomaal recessief PHA1 · Autosomaal recessief pseudohypoaldosteronisme type 1 · Gegeneraliseerd PHA1
ptPseudo-hipoaldosteronismo tipo 1 generalizadoPHA1 autossómica recessiva · PHA1 generalizada · Pseudo-hipoaldosteronismo autossómico recessivo tipo 1
plUogólniony pseudohipoaldosteronizm typu 1Autosomalny recesywny pseudohipoaldosteronizm typu 1
csGeneralizovaný pseudohypoaldosteronismus, typ 1Autozomálně recesivní pseudohypoaldosteronismus, typ 1
ukГенералізований псевдогіпоальдостеронізм, тип 1Аутосомно-рецесивний PHA1 · Аутосомно-рецесивний псевдогіпоальдостеронізм типу 1 · Узагальнений PHA1
zh全身性假性醛固酮减少症1型常染色体隐性遗传假性醛固酮减少症1型
trJeneralize psödohipoaldosteronizm tip 1Otozomal çekinik psödohipoaldosteronizm tip 1

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM264350BTNTvalidated
OMIM620125BTNTvalidated
OMIM620126BTNTvalidated
ICD-10N25.8NTBTattributedvalidated
ICD-11GB90.41NTBTindexvalidated
MONDO0009917Evalidated
UMLSC1449843Evalidated
GARD4552Evalidated

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

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SCNN1ADisease-causing germline mutation(s) (loss of function) inAssessedHGNC:10599ENSG0000011131960022812p13.31sodium channel epithelial 1 subunit alpha19571553[PMID]_23416952[PMID]_23762408[PMID]
SCNN1BDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:10600ENSG0000016844760076016p12.2sodium channel epithelial 1 subunit beta19571553[PMID]_23426840[PMID]
SCNN1GDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:10602ENSG0000016682860076116p12.2sodium channel epithelial 1 subunit gamma11231969[PMID]_19571553[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Prevalence at birth1-9 / 1 000 0000.6 / 100 000United KingdomValue and classValidated24616761[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

22 annotations · validated 2020-02-25
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0040085Abnormal circulating aldosterone
HP:0011740Glucocortocoid-insensitive primary hyperaldosteronism
HP:0002153Hyperkalemia
HP:0002902Hyponatremia
HP:0000848Increased circulating renin level
HP:0001942Metabolic acidosis
Frequent (79-30%)
HP:0001944Dehydration
HP:0001531Failure to thrive in infancy
HP:0031274Hypovolemic shock
HP:0200117Recurrent upper and lower respiratory tract infections
HP:0002013Vomiting
Occasional (29-5%)
HP:0011675Arrhythmia
HP:0001047Atopic dermatitis
HP:0001081Cholelithiasis
HP:0012735Cough
HP:0008872Feeding difficulties in infancy
HP:0002754Osteomyelitis
HP:0003508Proportionate short stature
HP:0200039Pustule
HP:0011110Recurrent tonsillitis
HP:0001824Weight loss
HP:0030828Wheezing

Run the differential on the 6 obligate / very frequent terms

Annotation source: 28804203[PMID]_31301676[PMID]

7

Sources for this card