raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2556

Microphthalmia with linear skin defects syndrome

Synonyms: MCOPS7 · MIDAS syndrome · MLS syndrome · Microphthalmia-dermal aplasia-sclerocornea syndrome · Syndromic microphthalmia type 7

Type
Malformation syndrome
Group
Disorder
Inheritance
X-linked dominant
Age of onset
Neonatal
Status
active

A rare X-linked, syndromic eye disorder characterized by ocular defects (microphthalmia, orbital cysts, corneal opacities) and linear skin dysplasia of the neck, head, and chin. Additional findings may include agenesis of corpus callosum, sclerocornea, chorioretinal abnormalities, hydrocephalus, seizures, intellectual deficit, and nail dystrophy.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMicrophthalmia with linear skin defects syndromeMCOPS7 · MIDAS syndrome · MLS syndrome · Microphthalmia-dermal aplasia-sclerocornea syndrome · Syndromic microphthalmia type 7
frMicrophtalmie avec défauts linéaires cutanésMCOPS7 · Microphtalmie syndromique type 7 · Syndrome MIDAS · Syndrome MLS · Syndrome de microphtalmie-aplasie dermique-sclérocornée
deMikrophthalmie-lineares Hautdefekt-SyndromMCOPS7 · MIDAS-Syndrom · MLS-Syndrom · Mikrophthalmie - Hautaplasie - Sklerokornea · Mikrophthalmie, syndromale, Typ 7
esSíndrome de microftalmia con defectos cutáneos linealesMCOPS7 · Microftalmia sindrómica tipo 7 · Síndrome MIDAS · Síndrome MLS · Síndrome de microftalmia-aplasia dérmica-esclerocórnea
itSindrome da microftalmia con difetti cutanei lineariMCOPS7 · Microftalmia - aplasia dermica - sclerocornea · Microftalmia sindromica, tipo 7 · Sindrome MIDAS · Sindrome MLS
nlMicroftalmie met lineaire huiddefecten-syndroomMCOPS7 · MIDAS-syndroom · MLS-syndroom · Microftalmie - dermale aplasie - sclerocornea-syndroom · Syndromale microftalmie type 7
ptSíndrome de microftalmia com defeitos cutâneos linearesSíndrome MIDAS · Síndrome MLS
plZespół małoocza z liniowym defektem skórnymMCOPS7 · Mikroftalmia - aplazja skóry - sclerocornea · Syndromiczna mikroftalmia typu 7 · Zespół MIDAS · Zespół MLS
csSyndrom zahrnující mikrooftalmii s lineárními defekty kůžeMCOPS7 · MIDAS syndrom · MLS syndrom · Syndrom zahrnující mikrooftalmii, dermální aplázii a sklerokorneu · Syndromická mikrooftalmie, typ 7
ukМікрофтальмія з синдромом лінійних дефектів шкіриMCOPS7 · Синдром мікрофтальмії-дермальної аплазії-склерокорнеа · Синдром MIDAS · Синдром MLS · Синдромна мікрофтальмія типу 7
zh小眼畸形伴线性皮肤缺损综合征小眼畸形-皮肤发育不全-硬化性角膜综合征
trLineer cilt defekti sendromlu mikroftalmiMCOPS7 · MLS sendromu · MIDAS sendromu · Sendromik mikroftalmi tip 7 · Mikroftalmi-dermal aplazi-sklerokornea sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM300887BTNTvalidated
OMIM300952BTNTvalidated
OMIM309801Evalidated
ICD-10Q11.2NTBTattributedvalidated
ICD-11LD21.0NTBTindexvalidated
MONDO0010672Evalidated
MeSHC537466Evalidated
UMLSC0796070Evalidated
GARD3659Evalidated

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 (8):

No children.

4

Genes

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
NDUFB11Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:20372ENSG00000147123300403Xp11.3NADH:ubiquinone oxidoreductase subunit B1125772934[PMID]
COX7BDisease-causing germline mutation(s) inAssessedHGNC:2291ENSG00000131174300885Xq21.1cytochrome c oxidase subunit 7B23122588[PMID]
HCCSDisease-causing germline mutation(s) inAssessedHGNC:4837ENSG00000004961300056Xp22.2holocytochrome c synthase17033964[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families55 casesWorldwideCase(s)Validated23122588[PMID]
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.

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HPO phenotypes

77 annotations · validated 2017-07-19
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001000Abnormality of skin pigmentation
HP:0000528Anophthalmia
HP:0008065Aplasia/Hypoplasia of the skin
HP:0000776Congenital diaphragmatic hernia
HP:0007957Corneal opacity
HP:0004334Dermal atrophy
HP:0010783Erythema
HP:0000953Hyperpigmentation of the skin
HP:0000568Microphthalmia
HP:0011800Midface retrusion
HP:0000647Sclerocornea
Frequent (79-30%)
HP:0001671Abnormal cardiac septum morphology
HP:0000499Abnormal eyelash morphology
HP:0000492Abnormal eyelid morphology
HP:0001999Abnormal facial shape
HP:0000614Abnormal nasolacrimal system morphology
HP:0004327Abnormal vitreous humor morphology
HP:0007703Abnormality of retinal pigmentation
HP:0000598Abnormality of the ear
HP:0011675Arrhythmia
HP:0001644Dilated cardiomyopathy
HP:0001639Hypertrophic cardiomyopathy
HP:0001053Hypopigmented skin patches
HP:0009939Mandibular aplasia
HP:0000347Micrognathia
HP:0000278Retrognathia
HP:0003510Severe short stature
HP:0011531Vitritis
HP:0000431Wide nasal bridge
HP:0000445Wide nose
Occasional (29-5%)
HP:0001597Abnormal nail morphology
HP:0000035Abnormal testis morphology
HP:0000682Abnormality of dental enamel
HP:0000363Abnormality of earlobe
HP:0004378Abnormality of the anus
HP:0011027Abnormality of the fallopian tube
HP:0000036Abnormality of the penis
HP:0002034Abnormality of the rectum
HP:0001331Absent septum pellucidum
HP:0001274Agenesis of corpus callosum
HP:0000062Ambiguous genitalia
HP:0000646Amblyopia
HP:0002381Aphasia
HP:0000618Blindness
HP:0007731Chorioretinal dysplasia
HP:0011265Cleft earlobe
HP:0008665Clitoral hypertrophy
HP:0002094Dyspnea
HP:0010529Echolalia
HP:0000039Epispadias
HP:0001508Failure to thrive
HP:0011968Feeding difficulties
HP:0004302Functional motor deficit
HP:0000501Glaucoma
HP:0001263Global developmental delay
HP:0001510Growth delay
HP:0000365Hearing impairment
HP:0000238Hydrocephalus
HP:0000047Hypospadias
HP:0001249Intellectual disability
HP:0000037Male pseudohermaphroditism
HP:0000252Microcephaly
HP:0001653Mitral regurgitation
HP:0001634Mitral valve prolapse
HP:0002300Mutism
HP:0000627Posterior embryotoxon
HP:0002098Respiratory distress
HP:0002878Respiratory failure
HP:0007973Retinal dysplasia
HP:0000556Retinal dystrophy
HP:0000960Sacral dimple
HP:0001250Seizure
HP:0001328Specific learning disability
HP:0002133Status epilepticus
HP:0005180Tricuspid regurgitation
HP:0001704Tricuspid valve prolapse
HP:0000572Visual loss

Run the differential on the 11 obligate / very frequent terms

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Sources for this card