M01.02.007 The Mastoid Fossa (MacEwen’s Triangle)

Understanding MacEwen’s Triangle (Mastoid Fossa) is essential in clinical practice, especially in the surgical approach to mastoid air cells and middle ear infections. This anatomical landmark, located on the posterior wall of the external auditory canal, is crucial for identifying a safe entry point during mastoidectomy. It provides access to the mastoid antrum, which is…