Petrositis most often refers to infection of the petrous portion of the temporal bone, the bone in the skull that surrounds the ear. This infection goes deep to the inner ear. It is sometimes associated with otitis media (a middle ear infection).
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Review Date 8/31/2021
Updated by: Josef Shargorodsky, MD, MPH, Johns Hopkins University School of Medicine, Baltimore, MD. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.