The article “Initial Evaluation of Vertigo” (January 15, 2006, page 244) contained an error in the definition of otosclerosis listed in Table 1 (page 246). The correct definition for otosclerosis is: Abnormal growth of bone in the middle ear, leading to immobilization of the bones of conduction and a conductive hearing loss. This process also may affect the cochlea, leading to tinnitus, vertigo, and sensorineural hearing loss. The online version of this article has been corrected.