A novel TFAP2A mutation in familial Branchio-Oculo-Facial Syndrome with predominant ocular phenotype

Introduction: Branchio-Oculo-Facial Syndrome (BOFS) is a rare autosomal dominant congenital disorder defined by branchial defects, ocular anomalies and craniofacial malformations, including variable degrees of cleft lip with or without cleft palate. In addition, temporal bone anomalies, renal and ec...

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Published in:Ophthalmic genetics 2011-11, Vol.32 (4), p.250-255
Main Authors: Aliferis, Konstantinos, Stoetzel, Corinne, Pelletier, Valérie, Hellé, Sophie, Angioï-Duprez, Karine, Vigneron, Jacqueline, Leheup, Bruno, Marion, Vincent, Dollfus, Hélène
Format: Article
Language:English
Subjects:
Adolescent
Branchio-Oto-Renal Syndrome - diagnosis
Branchio-Oto-Renal Syndrome - genetics
Choroid - abnormalities
Coloboma - genetics
Female
Frameshift Mutation
Genotype
Humans
Male
Microphthalmos - genetics
Middle Aged
Phenotype
Retina - abnormalities
Transcription Factor AP-2 - genetics
Young Adult
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Summary:Introduction: Branchio-Oculo-Facial Syndrome (BOFS) is a rare autosomal dominant congenital disorder defined by branchial defects, ocular anomalies and craniofacial malformations, including variable degrees of cleft lip with or without cleft palate. In addition, temporal bone anomalies, renal and ectodermal manifestations can be present. Mutations in the TFAP2A gene have been reported in patients with BOFS, prompting phenotype-genotype studies because of the variable clinical spectrum. Materials and Methods: We report on a family (a mother, her daughter and son) with BOFS and significant variability in clinical expression. The daughter presents predominantly with an ocular phenotype of unilateral microphthalmia and bilateral chorioretinal colobomas, whereas her brother is more severely affected contrasting with the paucisymptomatic mother. TFAP2A molecular analysis revealed a novel frameshift mutation. Discussion: We confirm the wide clinical spectrum of BOFS. The importance of upper lip examination in mild and paucisymptomatic cases is underlined. TFAP2A mutation spectrum is discussed and broadened by the report of the second frameshift mutation in this gene. Conclusion: Patients with BOFS and predominant ocular phenotypes can be underdiagnosed. In such cases, upper lip examination can be of important diagnostic value. TFAP2A analysis provides diagnostic confirmation and improves genetic counselling.
ISSN:1381-6810
1744-5094
DOI:10.3109/13816810.2011.592176