All are false about McEwen's triangle except:
(a) Mastoid antrum lies 1.5cm deep to it(Ref. Shambaugh, 6th ed., page 32)It is a surgical landmark for the mastoid antrum, lying in the postauricular area. It is bounded superiorly by temporal line/supra mastoid crest which is the posterior extension of suprameatal crest.The suprameatal crest is the superior root of the zygomatic process.
Mastoid antrum lies 1.5 cm deep to it
Surgical landmark for facial nerve
Present in preauricular region
It is bounded by suprameatal crest anteriorly
Ear