Diagnosis and treatment of secondary posterior semicircular canal benign paroxysmal positional vertigo

Objective To investigate the diagnosis and treatment of secondary benign paroxysmal positional vertigo(BPPV).Method We reported six cases of secondary posterior semicircular canal benign paroxysmal positional vertigo.The diagnosis w as based on history and nystagmus induced by Dix-Hallpike test.Results Six cases of inner ear disease associated w ith the posterior semicircular canal benign paroxysmal positional vertigo w as diagnosed by DixHallpike test.There w ere three cases of sudden deafness,tw o cases of Meniere's disease and one case of vestibular neuronitis,respectively.Vertical torsional nystagmuses w ere induced in all the patients.Conclusions Secondary benign paroxysmal positional vertigo is rare in clinic,and posterior semicircular canal w as involved mostly.It can be diagnosed and cured by the Dix-Hallpike test and Epley manipulative method.