Abstract

BNAR syndrome (MIM608980) is a very rare condition: nine cases belonging to three unrelated families were reported since its first description in 2002. The distinctive clinical feature is the bifidity of the tip of the nose and its association with anorectal and/or renal anomalies. Its molecular basis consisting of biallelic FREM1 missense or nonsense mutations was elucidated after studying the original Egyptian family and was confirmed in two families originating from Afghanistan and Pakistan. We describe a fourth family originating from Turkey with signs challenging the diagnostic criteria suggested by the description of the three reported families.

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