Superior semicircular canal dehiscence syndrome

Superior semicircular canal dehiscence syndrome is a set of hearing and balance symptoms, related to a common but rarely diagnosed medical condition of the inner ear, known as superior canal dehiscence. The symptoms are caused by a thinning or complete absence of the part of the temporal bone overlying the superior semicircular canal of the vestibular system. There is evidence that this rare defect, or susceptibility, is congenital. There are also numerous cases of symptoms arising after physical trauma to the head. It was first described in 1998 by Lloyd B. Minor of Johns Hopkins University in Baltimore. Superior semicircular canal dehiscence syndrome is a set of hearing and balance symptoms, related to a common but rarely diagnosed medical condition of the inner ear, known as superior canal dehiscence. The symptoms are caused by a thinning or complete absence of the part of the temporal bone overlying the superior semicircular canal of the vestibular system. There is evidence that this rare defect, or susceptibility, is congenital. There are also numerous cases of symptoms arising after physical trauma to the head. It was first described in 1998 by Lloyd B. Minor of Johns Hopkins University in Baltimore. Superior canal dehiscence (SCD) can affect both hearing and balance to different extents in different people.