mastoid air cell


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

mastoid air cell

Any of the variable-sized, air-filled sinuses inside the mastoid antrum. About 20% of adult skulls have no mastoid air cells.
See also: cell
References in periodicals archive ?
The other theory of development of the mastoid air cell system suggests that the precursors of the mastoid cells are present at birth as periantral, mesenchyme-filled loculi that are visible on histologic sections.
A transverse fracture through the external ear and mastoid air cells was present.
Computed tomography (CT) (Figs 1a, b and c) of the brain showed a large, destructive lesion in the left ear cavity, extending anterior to the pre-auricular region and posterior to the mastoid air cells.
Computed tomography of the sinuses demonstrated nonspecific opacification of the right mastoid air cells, leading to a diagnosis of otomastoiditis.
There was no bony erosion, the scutum was sharp and intact, and the antrum and mastoid air cells were well pneumatized.
1) Acute mastoiditis (AM) is a complication of AOM that involves inflammation and purulent invasion of the mastoid air cells.