raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:263347

MRCS syndrome

Synonyms: Microcornea-rod-cone dystrophy-cataract-posterior staphyloma syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Childhood
Status
active

MRCS syndrome is a rare, genetic retinal dystrophy disorder characterized by bilateral microcornea, rod-cone dystrophy, cataracts and posterior staphyloma, in the absence of other systemic features. Night blindness is typically the presenting manifestation and nystagmus, strabismus, astigmatism and angle closure glaucoma may be associated findings. Progressive visual acuity deterioration, due to pulverulent-like cataracts, results in poor vision ranging from no light perception to 20/400.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMRCS syndromeMicrocornea-rod-cone dystrophy-cataract-posterior staphyloma syndrome
frSyndrome MRCSSyndrome de microcornée-dystrophie des cônes et des bâtonnets-cataracte-staphylome postérieur
deMRCS-SyndromMikrokornea - Zapfen-Stäbchen-Dystrophie -Katarakt - posteriores Staphylom
esSíndrome MRCSMicrocórnea-distrofia de conos y bastones-cataratas-estafiloma posterior
itSindrome MRCSMicrocornea - distrofia dei coni e dei bastoncelli - cataratta - stafiloma posteriore
nlMRCS-syndroomMicrocornea - staaf-kegeldystrofie - cataract - posterieur stafyloom-syndroom
ptSíndrome MRCS
plZespół MRCSMała rogówka - dystrofia czopków i pręcików - zaćma - garbiak tylny
csMRCS syndromSyndrom zahrnující mikrokorneu, dystrofii tyčinek a čípků, katarakta a zadní stafylom
ukСиндром MRCSСиндром мікророгівки-стрижневої дистрофії рогівки-катарактальної стафіломи-задньої стафіломи
zhMRCS综合征小角膜-视杆-视锥营养不良-白内障-后葡萄肿综合征
trMRCS sendromuMikrokornea-çubuk-koni distrofi-katarakt-posterior stafiloma sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM193220NTBTvalidated
OMIM619082BTNTvalidated
ICD-10H35.5NTBTattributedvalidated
ICD-119E1YNTBTindexvalidated
MONDO0016979Evalidated
UMLSC4749856Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (4):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
BEST1Disease-causing germline mutation(s) inAssessedHGNC:12703ENSG0000016799560785411q12.3bestrophin 115452077[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families7 casesWorldwideCase(s)Validated16458719[PMID]_12543751[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_16458719[PMID]_12543751[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

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

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Sources for this card