Skip to Main Content

++

1. Bony atresia of the external auditory canal

++
Figure 33-1

Bony atresia of the external auditory canal.

A. The right ear is normal; B. There is a thin bony atresia plate (arrow) on the left.

Graphic Jump Location
++

2. Dilated vestibular aqueduct

++
Figure 33-2

Dilated vestibular aqueduct.

An axial CT image of a 3-year-old child with left-sided hearing loss shows a markedly dilated, funnel-shaped vestibular aqueduct (arrow).

Graphic Jump Location
++

3. Large vestibular aqueduct with large endolymphatic duct and sac

++
Figure 33-3

Large vestibular aqueduct with large endolymphatic duct and sac.

This 5-year-old child was evaluated for sensorineural hearing loss. A. An axial 3D T2-weighted steady-state free-precession (TRUFI) MR image shows dilation of the endolymphatic duct and sac (arrows). B. This image is 9mm inferior to (A). The dilated endolymphatic sac (arrow) is adjacent to the surface of the cerebellum and medial to the sigmoid sinus. (Images courtesy of Brian Lundeen, M.D., Pediatric Diagnostic Imaging, Milwaukee, WI)

Graphic Jump Location
++

4. Complete labyrinthine aplasia

++
Figure 33-4

Complete labyrinthine aplasia.

A, B, C. Axial and coronal images of a 12-year-old boy show complete lack of inner ear structures bilaterally. The ossicles are present. This child also has hypoplastic right mastoid air cells. There is fluid in the right middle ear cavity.

Graphic Jump Location
++

5. Common cavity deformity

++
Figure 33-5

Common cavity deformity.

The dysplastic cochlea and enlarged vestibule form a large cyst (arrow) that lacks differentiation.

Graphic Jump Location
++

6. Cystic cochleovestibular malformation

++
Figure 33-6

Cystic cochleovestibular malformation.

A, B. Anterior-to-superior axial CT images of a 2-year-old boy show marked hypoplasia of the cochlea (arrows). C. There is mild enlargement of the vestibule. D. The cochlea (arrow) has the appearance of a small cyst on this coronal image.

Graphic Jump Location
++

7. Mondini dysplasia

++
Figure 33-7

Mondini dysplasia.

A, B, C. Contiguous coronal reformatted CT images show a wide basal turn (arrow in A). The remainder of the cochlea is a common cavity (arrow in C) that lacks an interscalar septum.

Graphic Jump Location Graphic Jump Location
++

8. Lateral semicircular canal dysplasia

...

Want remote access to your institution's subscription?

Sign in to your MyAccess profile while you are actively authenticated on this site via your institution (you will be able to verify this by looking at the top right corner of the screen - if you see your institution's name, you are authenticated). Once logged in to your MyAccess profile, you will be able to access your institution's subscription for 90 days from any location. You must be logged in while authenticated at least once every 90 days to maintain this remote access.

Ok

About MyAccess

If your institution subscribes to this resource, and you don't have a MyAccess profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus.

Subscription Options

AccessPediatrics Full Site: One-Year Subscription

Connect to the full suite of AccessPediatrics content and resources including 20+ textbooks such as Rudolph’s Pediatrics and The Pediatric Practice series, high-quality procedural videos, images, and animations, interactive board review, an integrated pediatric drug database, and more.

$595 USD
Buy Now

Pay Per View: Timed Access to all of AccessPediatrics

24 Hour Subscription $34.95

Buy Now

48 Hour Subscription $54.95

Buy Now

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.