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suprameatal triangle


Definition: a triangle formed by the suprameatal spine, the inferior temporal line, and the vertical tangent to the posterior wall of the bony external auditory canal; used as a guide in mastoid operations to the mastoid antrum because the antrum lies directly medial to the suprameatal triangle.

Synonym(s): foveola suprameaticaTA, foveola suprameatalis, Macewen triangle, mastoid fossa, fossa mastoidea, supramastoid fossa, suprameatal pit

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.