mastoid air cell


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mastoid air cell

[′ma‚stȯid ′er ‚sel]
(anatomy)
References in periodicals archive ?
Assessment of the size of mastoid air cell system: The area of the cell system was determined by planimetry of the X-ray picture of the ear in a lateral projection.
In a study by Sethi et al, in the normal ear, 84% had well pneumatized mastoid air cell system and 16% had poor pneumatization on x-ray.
An animal study of chimpanzees described epithelial buds from the antrum, visible at 34 weeks, as precursors of the mastoid air cell system.
Surgical exploration identified a large tumor that involved the mastoid air cells from the mastoid antrum all the way up to the stylomastoid foramen.
The main goals of this technique are to completely eradicate the disease, create a large enough meatus for examination and mastoid air cells, and provide a self-cleaning epithelized dry cavity, and achieve maximum hearing.
Aeration of the temporal bone was also evaluated by preoperative CT scan and divided into the following four categories: the mastoid air cells, the epitympanum, the mesotympanum, and non-aerated.
High resolution computed tomography (CT) of temporal bones demonstrated hipodense mass (35-49 HU) in the left external ear canal, middle ear, antrum and mastoid air cells without bony destruction.
Pneumatized air cells present in the zygomatic process of the temporal bone, which appears similar to the mastoid air cells and which does not extend further anteriorly than the zygomatico-temporal suture, entitled as zygomatic air cell defect (ZACD).
At this time a repeat CT scan showed extensive abnormality of the left temporal bone and opacification of the left middle ear, external auditory canal and mastoid air cells.
The abscess occurs over the mastoid cortex when the infectious process within the mastoid air cells extends into the subperiosteal space.
1) that had engulfed the epitympanum with extrusion through the aditus ad antrum into the mastoid air cells.