[Audiological phenotypes of KBG syndrome: a case report and literatures review].

KBG syndrome is an uncommon autosomal dominant inheritance disease involving multiple systems caused by mutations of ANKRD11 gene. The patient, who has a series of symptoms including hearing loss, short stature, macrodontia of upper central incisors and mental retardation, was diagnosed with KBG syndrome. Pure tone audiometry showed bilateral conductive hearing loss, the temporal bone CT suggested there were deformed ossicular chain in bilateral middle ears, and X-ray showed bone age was only five years old or so, what is the most important is that genetic testing prompted a de novo mutation of ANKRD11. The aim of this article was to briefly analyze the audiological phenotypic characteristics of KBG syndrome and hope to improve the clinical attention to this disease.