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Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
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Unlock access to our full Course Library and all self-paced Fellowships.
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Get access to free live lectures, every week, from top radiologists.
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Get a free weekly case delivered right to your inbox.
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Learn directly from the MSK Master himself.
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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.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
Lesson
Inner Ear
49 topics, 3 hr. 16 min.
Inner Ear Preview
2 m.Inner Ear – Introduction
2 m.Anatomy of the Internal Auditory Canal (IAC)
8 m.Coronal Anatomy of the Inner Ear
4 m.Axial IAC Anatomy and Otospongiosis/Otosclerosis
6 m.Coronal IAC Anatomy and Facial Nerve Segments
6 m.MRI imaging techniques and cochlea aplasia
7 m.IAC Congenital Lesions & Syndromes - Summary
7 m.Cochlear Hypoplasia
8 m.Cochlear Nerve Deficiency, Pontine Tegmental Cap Dysplasia
5 m.Bilateral Cochlea Nerve Deficiency
5 m.Labyrinthine Dysplasia/Syndromes - Summary
10 m.Incomplete Partition Type 1
3 m.Incomplete Partition Type 2 – Summary
3 m.Bilateral Incomplete Partition Type 2
3 m.Mondini Malformation, Incomplete Partition Type II
2 m.Incomplete Partition Type II, Mondini Malformation, Semicircular Canal Abnormality
3 m.Vestibular Malformation
3 m.Enlarged Endolymphatic Sac
2 m.Incomplete Partition Type III – Summary
4 m.Down Syndrome – Summary
6 m.Down Syndrome, Semicircular Canal Deformity, Cochlear Aperture Stenosis
6 m.Down Syndrome, Aperture Stenosis
6 m.Cochlear Hypoplasia and Aperture Stenosis - Summary
4 m.Semicircular Canal (SCC) Dehiscence – Summary
4 m.Semicircular Canal (SCC) Dehiscence
3 m.Semicircular Canal (SCC) – Oblique Reformat
2 m.Inflammatory/Infectious Lesions of the Inner Ear - Summary
7 m.Labyrinthitis, Secondary to Otomastoiditis
3 m.Labyrinthine Fistula Mastoidectomy and Cochlea implant
3 m.Viral Labyrinthitis
3 m.Otospongiosis (Otosclerosis) - Summary
10 m.Bilateral Otospongiosis (Otosclerosis)
5 m.Bilateral Retrofenestral Otospongiosis
4 m.Bilateral Otospongiosis and SCC Dehiscence
3 m.Otospongiosis, Left Stapedectomy
3 m.Labyrinthitis Ossificans – Summary
11 m.Post Traumatic Labyrinthitis Ossificans
3 m.Labyrinthitis Ossificans, Cochlear Turn
2 m.Labyrinthitis Ossificans, Superior SCC
2 m.Unilateral Labyrinthine Ossificans
2 m.Petrous Apex Lesions
8 m.Right Cholesterol Granuloma
5 m.Intravestibular/Labyrinthine schwannoma
3 m.Labyrinthine Schwannoma
4 m.Left Side Labyrinthine/Vestibule Schwannoma
2 m.Endolymphatic Sac Tumor (ELST) – Summary
4 m.Endolymphatic Sac Tumor and VHL
4 m.Inner Ear Malignant Neoplasm and Trauma Closing Points
6 m.0:01
I want to compare and contrast the right side from
0:04
the left side on this patient who had left
0:06
sided sensorineural hearing loss.
0:09
In looking at the inner ear structures
0:12
on the right side,
0:15
the intralabyrinthine canal looks pretty good there's.
0:19
Nice cochlear aperture.
0:21
The medius of the cochlea looks fine.
0:23
We have the basal turn, we have the middle turn,
0:25
we have the apical turn.
0:26
We have a normal vestibule and relatively normal
0:30
looking lateral semicircular canals,
0:32
as well as posterior and superior
0:34
semicircular canals. Now,
0:37
if the patient has dramatic sensorineural
0:40
hearing loss that's unilateral,
0:42
we may end up getting an MRI scan to
0:44
look for a vestibular schwannoma.
0:46
So let's look on the left side,
0:47
which was the symptomatic side.
0:49
On the left side,
0:50
what we see is the residual of a fracture that went
0:54
across the internal auditory canal and also
1:00
went through and into the cochlea.
1:03
So here is the fracture plane that one sees
1:06
affecting the basal turn of the cochlea.
1:11
This patient, here's the fracture line again,
1:13
that you can see coming across the vestibule,
1:17
look at the lateral semicircular canal.
1:21
You see that it has bony obliteration of
1:25
labyrinthitis ossificans secondary to the fracture,
1:30
which led to a hemo labyrinth,
1:32
blood in the labyrinth.
1:34
So, as opposed to the more normal appearance of the
1:38
lateral semicircular canal on the right side,
1:40
which was not fractured, on the left side,
1:43
we see labyrinthitis ossificans affecting the lateral
1:48
semicircular canal secondary to a previous fracture.
1:53
This patient, by the way,
1:55
also has a soft tissue mass here over the cochlear
2:00
promontory that ended up being an epidermoid.
Post Traumatic Labyrinthitis Ossificans
HIDEInteractive Transcript
0:01
I want to compare and contrast the right side from
0:04
the left side on this patient who had left
0:06
sided sensorineural hearing loss.
0:09
In looking at the inner ear structures
0:12
on the right side,
0:15
the intralabyrinthine canal looks pretty good there's.
0:19
Nice cochlear aperture.
0:21
The medius of the cochlea looks fine.
0:23
We have the basal turn, we have the middle turn,
0:25
we have the apical turn.
0:26
We have a normal vestibule and relatively normal
0:30
looking lateral semicircular canals,
0:32
as well as posterior and superior
0:34
semicircular canals. Now,
0:37
if the patient has dramatic sensorineural
0:40
hearing loss that's unilateral,
0:42
we may end up getting an MRI scan to
0:44
look for a vestibular schwannoma.
0:46
So let's look on the left side,
0:47
which was the symptomatic side.
0:49
On the left side,
0:50
what we see is the residual of a fracture that went
0:54
across the internal auditory canal and also
1:00
went through and into the cochlea.
1:03
So here is the fracture plane that one sees
1:06
affecting the basal turn of the cochlea.
1:11
This patient, here's the fracture line again,
1:13
that you can see coming across the vestibule,
1:17
look at the lateral semicircular canal.
1:21
You see that it has bony obliteration of
1:25
labyrinthitis ossificans secondary to the fracture,
1:30
which led to a hemo labyrinth,
1:32
blood in the labyrinth.
1:34
So, as opposed to the more normal appearance of the
1:38
lateral semicircular canal on the right side,
1:40
which was not fractured, on the left side,
1:43
we see labyrinthitis ossificans affecting the lateral
1:48
semicircular canal secondary to a previous fracture.
1:53
This patient, by the way,
1:55
also has a soft tissue mass here over the cochlear
2:00
promontory that ended up being an epidermoid.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Trauma
Temporal bone
Non-infectious Inflammatory
Neuroradiology
Head and Neck
CT
Brain
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