Mc Ewans triangle is located on: (A) Mastoid antrum, (B) Inner ear, (C) Cochlea, (D) Saccule
Answer is A. MacEwen's triangle is bounded by temporal line,posterosuperior segment of bony external auditory canal and the line drawn as a tangent to the external canal. It is an impoant landmark to locate the mastoid antrum in mastoid surgery. Reference-Dhingra 6/e,p 6.