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Medical Term:

mastoid antrum


a cavity in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to the mastoid antrum.

Synonym(s): antrum mastoideumTA, tympanic antrum, Valsalva antrum

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.