Orphanet: Blepharophimosis intellectual disability syndrome, MKB type

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Blepharophimosis-intellectual disability syndrome, MKB type

Disease definition

A rare, X-linked, syndromic, intellectual disability disorder affecting only boys and characterized by global development delay with little or no speech, urogenital abnormalities, including scrotal hypoplasia, micro penis, and cryptorchidism, autistic behavior, and facial dysmorphism. Most typical facial features are ptosis, blepharophimosis, a bulbous nasal tip, a long philtrum, and maxillar hypoplasia with full cheeks. Other variable features include microcephaly, hearing loss, dental anomalies, and hyperextensible joints.


Classification level: Disorder
  • Synonym(s):
    • BMRS, MKB type
    • BMRS, Maat-Kievit-Brunner type
    • Blepharophimosis-intellectual disability syndrome, Maat-Kievit-Brunner type
    • X-linked Ohdo syndrome
  • Prevalence: <1 / 1 000 000
  • Inheritance: X-linked recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: Q87.8
  • OMIM: 300895
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -

Detailed information


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