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Orofaciodigital syndrome type 2
Oral-facial-digital (OFD) type 2 is characterized by hand and feet deformities, facial deformities, midline cleft of the upper lip and tongue hamartomas.
ORPHA:2751Classification level: Disorder
Less than 20 cases have been reported so far.
Main clinical features include bilateral preaxial polydactyly of hands and feet, partial duplication of hallux, brachydactyly, syndactyly, scoliosis, pectus excavatums, short stature, muscular hypotonia, conductive hearing loss. Facial dysmorphism may include midface hypoplasia, hypertelorism, antimongoloid slant, broad nasal root, bifid nasal tip, cleft palate, microglossia, lobulated tongue, thick frenulum and low set ears. Microcephaly, porencephaly and internal hydrocephalus are also observed. Intelligence is normal in the majority of cases. Intellectual deficit and increased susceptibility to respiratory infections have been described in some patients. Involvement of the central nervous system (cerebellar atrophy) seems to be a clinical feature of OFD2.
The causative gene has not yet been identified.
Autosomal recessive inheritance has been suggested.
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