raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3203

Overhydrated hereditary stomatocytosis

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Infancy, Neonatal
Status
active

A rare disorder of red blood cell membrane permeability to monovalent cations characterized clinically by hemolytic anemia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enOverhydrated hereditary stomatocytosis
frStomatocytose héréditaire avec hématies hyperhydratéesStomatocytose familiale avec hématies hyperhydratées
deÜberhydrierte hereditäre StomatozytoseOHS (Overhydrated Hereditary Stomatocytosis)
esEstomatocitosis hereditaria con hematíes hiperhidratados
itStomatocitosi ereditaria con emazie iperidratate
nlOvergehydrateerde erfelijke stomatocytose
ptEstomatocitose hereditária hiper-hidratada
plDziedziczna uwodniona stomatocytoza
csHyperhydratovaná hereditární stomatocytóza
ukСпадковий стоматоцитоз з гіпергідратацією
zh遗传性口形红细胞增多症
trAşırı hidrate kalıtsal stomatositoz

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM185000Evalidated
ICD-10D58.8NTBTattributedvalidated
ICD-113A10.YNTBTindexvalidated
MONDO0008493Evalidated
UMLSC1861455Evalidated
GARD4183Evalidated

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
RHAGDisease-causing germline mutation(s) inAssessedHGNC:10006ENSG000001120771802976p12.3Rh associated glycoprotein23664421[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 familiesWorldwideFamily(ies)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

11 annotations · validated 2019-10-09
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0025065Abnormal mean corpuscular volume
HP:0025547Decreased mean corpuscular hemoglobin concentration
HP:0001878Hemolytic anemia
HP:0005502Increased red cell osmotic fragility
HP:0001923Reticulocytosis
HP:0004446Stomatocytosis
Occasional (29-5%)
HP:0001977Abnormal thrombosis
HP:0011273Anisocytosis
HP:0025435Increased circulating lactate dehydrogenase concentration
HP:0001046Intermittent jaundice
HP:0001744Splenomegaly

Run the differential on the 6 obligate / very frequent terms

Annotation source: 29559519[PMID]_15180870[PMID]_31364155[PMID]_21859730[PMID]_28447420[PMID]

7

Sources for this card