The mastoid process is a conical prominence projecting from the undersurface of the mastoid portion of the [[temporal bone]]. It is located just behind the [[external acoustic meatus]], and lateral to the [[styloid process]].

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DM: [[Digastric muscle]]; EAC: [[External auditory canal]]; IOM: [[Obliquus capitis inferior muscle]]; LEM: [[levator scapulae muscle]]; MP: [[mastoid process]]; SOM: [[Obliquus capitis superior muscle]].