raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:31043

Primary hypomagnesemia with hypercalciuria and nephrocalcinosis without severe ocular involvement

Synonyms: FHHNC without severe ocular involvement · HOMG3 · Renal hypomagnesemia type 3

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

Familial primary hypomagnesemia with hypercalciuria and nephrocalcinosis without severe ocular involvement (FHHN) is a form of familial primary hypomagnesemia (FPH), characterized by recurrent urinary tract infections, nephrolithiasis, bilateral nephrocalcinosis, renal magnesium (Mg) wasting, hypercalciuria and kidney failure.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPrimary hypomagnesemia with hypercalciuria and nephrocalcinosis without severe ocular involvementFHHNC without severe ocular involvement · HOMG3 · Renal hypomagnesemia type 3
frHypomagnésémie primaire avec hypercalciurie et néphrocalcinose sans atteinte oculaire sévèreFHHNC sans atteinte oculaire sévère · HOMG3 · Hypomagnésémie rénale type 3
deFamiliäre Hypomagnesiämie mit Hyperkalziurie und Nephrokalzinose ohne schwere AugenbeteiligungFHHNC ohne schwere Augenbeteiligung · HOMG3 · Hypomagnesiämie, renale, Typ 3
esHipomagnesemia primaria con hipercalciuria y nefrocalcinosis sin afectación ocular graveFHHNC sin afectación ocular grave · HOMG3 · Hipomagnesemia renal tipo 3
itIpomagnesemia primitiva con ipercalciuria e nefrocalcinosi senza interessamento oculare graveFHHNC senza coinvolgimento oculare grave · HOMG3 · Ipomagnesemia renale tipo 3
nlPrimaire hypomagnesiëmie met hypercalciurie en nefrocalcinose zonder ernstige oculaire betrokkenheidFHHNC zonder ernstige oculaire betrokkenheid · HOMG3 · Renale hypomagnesiëmie type 3
ptHipomagnesemia primária com hipercalciúria e nefrocalcinose sem envolvimento ocular graveFHHNC sem envolvimento ocular grave · HOMG3 · Hipomagnesemia renal tipo 3
plPierwotna hipomagnezemia rodzinna z hiperkalciurią i nefrokalcynozą bez ciężkiego uszkodzenia oczuFHHNC bez poważnych zmian narządu wzroku · Hipomagnezemia nerkowa typu 3 · HOMG3 · Pierwotna hipomagnezemia z hipekalciurią i nefrokalcynozą bez ciężkiego zajęcia oczu
csPrimární hypomagnezémie s hyperkalciurií a nefrokalcinózou bez těžkého postižení očíHOMG3 · Renální hypomagnezémie, typ 3 · FHHNC bez těžké oční poruchy
ukПервинна гіпомагніємія з гіперкальціурією та нефрокальцинозом без тяжкого ураження очейFHHNC без тяжкого ураження очей · HOMG3 · Ниркова гіпомагніємія типу 3
zh家族原发性低镁血症合并高钙尿症和肾钙质沉着症不伴严重眼部累及FHHNC不伴严重眼部累及
trAilesel primer hipomagnezemi, hiperkalsiüri ve ağır oküler tutulumu olmayan nefrokalsinozHOMG3 · Böbrek hipomagnezemi tip 3 · Ağır oküler tutulumu ile seyretmeyen FHHNC

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM248250Evalidated
ICD-10E83.4NTBTattributedvalidated
ICD-115C64.41NTBTindexvalidated
MONDO0009550Evalidated
UMLSC4511528Evalidated
GARD2906Evalidated

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
CLDN16Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:2037ENSG000001139466039593q28claudin 1618816383[PMID]_11518780[PMID]_10878661[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families110 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—EuropeClass onlyNot yet validatedORPHANET

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card