epitympanum


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epitympanum

[¦ep·ə′tim·pə·nəm]
(anatomy)
The attic of the middle ear, or tympanic cavity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A postauricular incision is more appropriate for excising small, discrete lesions of the anterior mesotympanum or when mastoidectomy is anticipated for tumors that extend to the epitympanum, hypotympanum, or outside the middle ear space.
(c) (10x) Epitympanum showing ganglion cells (arrow).
The lesion, although extensive, also seemed to arise from the epitympanum. Tegmen tympani and lateral semi-circular wall dehiscence were also visible (Fig.
This exposure were also enough for C1a (Lateral epitympanum and Prussak's space lesions), C2b (Mesotympanum, Protympanum, sinus tympani and Hypotympanum cholesteatomas), C2c (Posterior and inferior extensions) lesions and C3 cholesteatoma involving retrotympanic space (Sinus tympani/subtympanic sinus; subpyramidal space) and or with facial nerve involvement.
Less commonly, there was immobilization of the first and second ossicles (fixation in the epitympanum), bony callus covering the body of the incus and the lateral semi-circular canal, and exposure of the tympanic segment of the facial nerve overlying the stapes footplate.
We removed the tumor by dissecting the temporal bone from the mastoid to the epitympanum. We removed the granulation tissue in the epitympanum.
Subsequent MRI and computed tomography (CT) demonstrated a destructive right petrous apex lesion with extension into the carotid canal and the medial epitympanum up to the Meckel cave.
Middle ear osteomas (MEOs) are benign lesions arising from the bony structures of the middle ear and epitympanum [3].
Epitympanic (Attic) cholesteatomas arise in the pars flaccida and grow upwards towards the epitympanum. These may be subdivided into lateral epitympanic cholesteatomas if they involve only the Prussak's space, posterior epitympanic cholesteatomas if they grow medial to the incus to involve the posterior epitympanic space, anterior epitympanic cholesteatoma if they grow anteriorly to fill the space anterior to the cog.
There was also nondependent soft tissue abutting the posterior middle ear and extending into the epitympanum, with marked erosion of the incus body.
Partial scutum removal to create only a window at the scutum (for access to the epitympanum)while preserving its inferior border is also to be classified as [M.sub.2a].
In early stages, it was used to provide information regarding pathology in the epitympanum, mesotympanum and mastoid antrum and to check the assessment of ossicular chain mobility.