Temporomandritis

During the development of temporal bones, the best place for gasification is the mastoid process, while rock bones have poor gasification, only 30% of the rock bones are well developed, the air chamber can reach the rock tip, and the inflammation can only be caused by the infection of the small chamber during chronic otitis media. Involving yanjian, the incidence of yanjianitis is very low clinically. Rock bone chambers are divided into two groups, the upper posterior group surrounds the tympanic sinus, tympanum, and semicircular canal, and the lower posterior group surrounds the lower tympanic cavity, eustachian tube, and cochlea. If the acute middle ear mastoiditis is improperly treated and develops into concealed mastoiditis, it can gradually make the rock bone and air cells fuse and necrosis, invade the rock tip and form an abscess. It can also be caused by chronic otitis media with cholesteatoma and bone destruction, which develops slowly. In some patients, symptoms appear only 1 to 2 weeks after simple mastoid excision.