| Mastoid cells | |
|---|---|
 Coronal section of right temporal bone. (Mastoid cells labeled at bottom left.) | |
 MRI showing fluid in mastoid air cells | |
| Details | |
| Artery | Stylomastoid artery |
| Identifiers | |
| Latin | cellulae mastoideae |
| TA98 | A15.3.02.029 |
| TA2 | 646 |
| FMA | 72001 |
| Anatomical terminology | |
The mastoid cells (also called air cells of Lenoir or mastoid cells of Lenoir) are air-filled cavities within the mastoid process of the temporal bone of the cranium. The mastoid cells are a form of skeletal pneumaticity. Infection in these cells is called mastoiditis.
The term cells here refers to enclosed spaces, not cells as living, biological units.