Orofaciodigital syndrome type 4

Orofaciodigital syndrome type 4 (OFD4), also known as Mohr-Majewski syndrome or oral-facial-digital syndrome type IV, is a rare genetic disorder characterized by abnormalities of the mouth (oral), face (facial), and fingers and toes (digital). It is considered one of the more severe forms within the orofaciodigital syndrome spectrum. Key oral features include lobulated or bifid tongue, lingual hamartomas, cleft lip, and cleft palate. Facial features may include a broad nasal root, hypertelorism (widely spaced eyes), and micrognathia (small jaw). Digital abnormalities are prominent and include polydactyly (extra fingers or toes), syndactyly (fused digits), brachydactyly (short digits), and tibial dysplasia, which distinguishes this subtype from other orofaciodigital syndromes. Skeletal anomalies, particularly of the long bones including tibial deficiency or aplasia, are a hallmark feature that helps differentiate OFD4 from other OFD subtypes. Additional features may include intellectual disability, congenital heart defects, and central nervous system anomalies in some patients. The severity of the condition is variable, but the presence of significant tibial abnormalities can lead to substantial limb dysfunction. Porencephaly and other brain malformations have been reported in some cases. There is currently no cure for OFD4, and management is symptomatic and supportive. Treatment typically involves a multidisciplinary approach including surgical correction of cleft lip and palate, orthopedic interventions for limb and skeletal anomalies, dental care, and speech therapy. Developmental support and early intervention services may be beneficial for children with intellectual disability. Genetic counseling is recommended for affected families.

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