Mastoid air cells are open, air-containing spaces in one of the skull bones.
An infection of the mastoid air cells that cannot be controlled with antibiotics may call for surgical treatment.
A mastoidectomy is the surgical removal of these mastoid air cells; the surgery may extend into the middle ear.
Reviewed By: Debra G. Wechter, MD, FACS, general surgery practice specializing in breast cancer, Virginia Mason Medical Center, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.