Upon reaching the posterolateral wall of the attic further expansion of the cholesteatoma is deflected superiorly toward the aditus ad antrum and mastoid antrum.
Attic and antrum of ear.
The diagnosis of cholesteatoma is based on clinical evaluation otoscopy where retraction of the tympanic membrane with pars flaccida perforation and a whitish mass in the middle ear are observed11.
Facial nerve courses just below the aditus.
Sclerosing of mastoid air cells were encountered in 60 7 of patients and the lateral semicircular canal was affected in 9 while facial canal erosion was found in 21 4.
Middle ear cavity the cavity of the middle ear is a narrow air filled space.
Terolateral portion of the attic and then through the aditus ad antrum towards the antrum and the mastoid air cells10.
Tympanums tympana is an air filled chamber in the petrous part of the temporal bone.
The antrum communicates behind and below with the mastoid air cells which vary considerably in number size and form.
It is separated from the external ear by the tympanic membrane and from the inner ear by the medial wall of the tympanic cavity.
It contains the three auditory ossicles whose purpose is to transmit sound vibrations from.
The mastoid antrum tympanic antrum antrum mastoideum valsalva s antrum is an air space in the petrous portion of the temporal bone communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to mastoid antrum entrance to the mastoid antrum.
The antrum and mastoid air cells.
Several techniques have been described with variable recurrence rates.
These air spaces function as sound receptors provide voice resonance act as.
The aim of the study was to describe this surgical technique and its indications and to analyse long term outcomes.
The bony prominence of the horizontal canal lies on its medial side while the fossa incudis to which is attached the short process of incus lies laterally.
The middle ear or middle ear cavity also known as tympanic cavity or tympanum plural.
A slight constriction divides it into an upper and a lower chamber the tympanum tympanic cavity proper below and the epitympanum above.
Attic exposure and antrumexclusion ae ae is an on demand surgical technique for the treatment of cholesteatoma.
The scutum and lateral attic wall were the most common bony erosions in the middle ear bony wall 64 3 and the incus was the most eroded ossicle in the middle ear 88 2.
At ĭ ko an trot ah me surgical exposure of the epitympanic recess attic and mastoid antrum.
As the cholesteatoma fills the aditus ad antrum the adjacent lateral semicircular canal is at risk.
