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Fellowship Certificate™ Programs
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Supplement your training program with case-based learning for residents, registrars, fellows, and more.
For Private Practices
Upskill in high growth, advanced imaging areas.
Compliance
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Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
28 topics, 2 hr. 36 min.
Introduction to External Auditory Canal (EAC)
5 m.Axial Anatomy Temporal Bone - Summary
17 m.Coronal Anatomy Temporal Bone - Summary
10 m.Temporal Bone Anatomy and Cerumen Impaction
13 m.EAC Congenital Lesions
11 m.Critical Issues in Ear Reconstruction – Summary
5 m.EAC Atresia
8 m.Other Congenital EAC Anomalies - Summary
6 m.Branchial Cleft Cyst Work Type 2 With Fistula
5 m.Superinfected First Branchial Cleft Cyst with Fistula
5 m.EAC Mass: Epidermal Inclusion Cyst
4 m.External Ear Infections - Malignant Otitis Externa
10 m.Malignant Otitis Externa
4 m.Otomastoiditis and EAC Soft Tissue Mass
6 m.Relapsing Polychondritis
3 m.EAC Fungal Infection
5 m.Malignant External Otitis in a Diabetic
3 m.EAC Benign Masses – Summary
8 m.EAC Bony Overgrowth
5 m.EAC Exostoses
3 m.Fibrovascular Polyp of EAC
3 m.Acquired Cholesteatoma
4 m.EAC Cholesteatoma
5 m.EAC Paraganglioma
5 m.EAC Neurofibroma
4 m.EAC Malignancies – Summary
6 m.Squamous Cell Carcinoma (SCC) Spread to EAC
3 m.Review of EAC Disease
4 m.0:00
This was a cold water swimmer who presented
0:03
with painful bilateral ear pain.
0:08
And on the axial CT scan images on this case,
0:14
we come into the external auditory canal and we see
0:17
that there are blocks of bone that appear to be
0:20
encroaching on the external auditory canal,
0:22
both anteriorly as well as posteriorly
0:26
on the right side.
0:28
In addition,
0:29
you note that there's a little bit of narrowing of
0:33
the aperture of the external auditory
0:36
canal along the medial aspect of it.
0:40
The middle ear cavity looks pretty good.
0:42
We're not seeing the tympanic membrane quite so
0:45
good on the right side.
0:47
On the left side,
0:47
we actually see the tympanic membrane is somewhat
0:50
thickened and it's on the external
0:53
auditory canal portion of it.
0:54
This is this little area here where the
0:57
malleus is inserting as the umbo.
1:00
So that's on the middle ear side and no
1:04
opacification of the middle ear cavity.
1:07
On the extraordinary canal on the left side,
1:11
you again see some of this thickening which appears
1:13
to affect the anterior wall and inferior wall of the
1:18
extra auditory canal more so than the superior wall.
1:21
Note that even though there is
1:23
that thickening of the wall,
1:25
we really don't see any soft tissue thickening
1:28
of the external auditory canal on either side.
1:34
On the coronal scan,
1:35
what is apparent is that the bony canal narrowing is
1:40
predominantly due to the bony overgrowth
1:41
bilaterally of the inferior,
1:44
more so than the superior wall of the external
1:47
auditory canal. Overlying it,
1:50
no soft tissue. Medial to it,
1:53
along the tympanic membrane on the left side,
1:55
you see that there is an element of inflammation
1:59
that's up against the tympanic membrane on the left.
2:02
So this is a patient, by virtue of having bilateral
2:06
involvement associated with external auditory canal
2:09
stenosis from that bony overgrowth is a
2:13
characteristic feature of cold
2:15
water swimmers and exostosis.
2:18
This patient's canal narrowing of the medial aspect
2:24
of the external auditory canal
2:27
was apparent also at the time of the
2:31
surgery for removal of those exostoses.
Interactive Transcript
0:00
This was a cold water swimmer who presented
0:03
with painful bilateral ear pain.
0:08
And on the axial CT scan images on this case,
0:14
we come into the external auditory canal and we see
0:17
that there are blocks of bone that appear to be
0:20
encroaching on the external auditory canal,
0:22
both anteriorly as well as posteriorly
0:26
on the right side.
0:28
In addition,
0:29
you note that there's a little bit of narrowing of
0:33
the aperture of the external auditory
0:36
canal along the medial aspect of it.
0:40
The middle ear cavity looks pretty good.
0:42
We're not seeing the tympanic membrane quite so
0:45
good on the right side.
0:47
On the left side,
0:47
we actually see the tympanic membrane is somewhat
0:50
thickened and it's on the external
0:53
auditory canal portion of it.
0:54
This is this little area here where the
0:57
malleus is inserting as the umbo.
1:00
So that's on the middle ear side and no
1:04
opacification of the middle ear cavity.
1:07
On the extraordinary canal on the left side,
1:11
you again see some of this thickening which appears
1:13
to affect the anterior wall and inferior wall of the
1:18
extra auditory canal more so than the superior wall.
1:21
Note that even though there is
1:23
that thickening of the wall,
1:25
we really don't see any soft tissue thickening
1:28
of the external auditory canal on either side.
1:34
On the coronal scan,
1:35
what is apparent is that the bony canal narrowing is
1:40
predominantly due to the bony overgrowth
1:41
bilaterally of the inferior,
1:44
more so than the superior wall of the external
1:47
auditory canal. Overlying it,
1:50
no soft tissue. Medial to it,
1:53
along the tympanic membrane on the left side,
1:55
you see that there is an element of inflammation
1:59
that's up against the tympanic membrane on the left.
2:02
So this is a patient, by virtue of having bilateral
2:06
involvement associated with external auditory canal
2:09
stenosis from that bony overgrowth is a
2:13
characteristic feature of cold
2:15
water swimmers and exostosis.
2:18
This patient's canal narrowing of the medial aspect
2:24
of the external auditory canal
2:27
was apparent also at the time of the
2:31
surgery for removal of those exostoses.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Temporal bone
Non-infectious Inflammatory
Neuroradiology
Neoplastic
Idiopathic
Head and Neck
CT
Brain
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