Orofaciodigital syndrome

Orofaciodigital syndrome (OFD syndrome) refers to a heterogeneous group of rare genetic disorders characterized by abnormalities of the oral cavity (mouth), face, and digits (fingers and toes). Orphanet code 140997 represents the broader grouping of orofaciodigital syndromes, which encompasses multiple subtypes (historically numbered OFD type I through at least type XIV). Common oral features include cleft lip, cleft palate, lobulated or bifid tongue, lingual hamartomas, accessory frenula, and dental anomalies. Facial features may include facial asymmetry, hypertelorism (widely spaced eyes), micrognathia, and a broad nasal root. Digital abnormalities frequently include brachydactyly (short digits), syndactyly (fused digits), clinodactyly (curved digits), and polydactyly (extra digits). Depending on the specific subtype, additional organ systems may be affected, including the central nervous system (structural brain malformations such as cerebellar abnormalities, corpus callosum agenesis, and intellectual disability), kidneys (polycystic kidney disease, particularly in OFD type I), and skeleton. OFD type I (Papillon-Léage-Psaume syndrome) is the most well-characterized subtype and is caused by pathogenic variants in the OFD1 gene; it follows X-linked dominant inheritance and is typically lethal in males. Other subtypes may follow autosomal recessive inheritance and involve genes related to ciliary function, as many OFD syndromes are classified as ciliopathies. There is currently no cure for orofaciodigital syndromes. Management is multidisciplinary and symptomatic, involving surgical correction of oral clefts and digital malformations, dental care, speech therapy, monitoring of renal function, and neurodevelopmental support when needed. Genetic counseling is recommended for affected families to clarify the specific subtype and recurrence risk.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

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