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Training Collections
Library Memberships
On-demand course library with video lectures, expert case reviews, and more
Fellowship Certificate™ Programs
Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
Ultimate Learning Pass
Unlock access to our full Course Library and all self-paced Fellowships.
Continuing Medical Education (State CME)
Complete all of your state CME requirements in one convenient place.
Noon Conference (Free)
Get access to free live lectures, every week, from top radiologists.
Case of the Week (Free)
Get a free weekly case delivered right to your inbox.
Case Crunch: Rapid Case Review (Free)
Register for free live board reviews.
Dr. Resnick's MSK Conference
Learn directly from the MSK Master himself.
Lower Extremities MRI Conference
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
For Training Programs
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
NewTrack, fulfill, and report on all your radiologists' credentialing and licensing requirements.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
Lesson
Oral Cavity Anatomy
7 topics, 29 min.
Lesson
Oral Cavity Staging of Squamous Cell Malignancy
18 topics, 1 hr. 26 min.
Principles of T Staging of Oral Cavity Squamous Cell Malignancy
4 m.Principles of N and M Staging of Oral Cavity Squamous Cell Malignancy
6 m.Diagnosis of Oral Tongue Squamous Cell Malignancy
6 m.T Staging of Oral Tongue Squamous Cell Malignancy
6 m.N and M Staging of Oral Tongue Squamous Cell Malignancy
5 m.Diagnosis of Buccal Mucosal Squamous Cell Malignancy
4 m.T Staging of Buccal Mucosal Squamous Cell Malignancy
3 m.N and M Staging of Buccal Mucosal Squamous Cell Malignancy
3 m.Diagnosis of Alveolar Mucosal Squamous Cell Malignancy
7 m.T Staging of Alveolar Mucosal Squamous Cell Malignancy
6 m.Diagnosis of Retromolar Trigone Squamous Cell Malignancy
6 m.T Staging of Retromolar Trigone Squamous Cell Malignancy
5 m.Diagnosis of Hard Palate Squamous Cell Malignancy
4 m.T Staging of Hard Palate Squamous Cell Malignancy
4 m.Diagnosis of Floor of Mouth Squamous Cell Malignancy
9 m.T Staging of Floor of Mouth Squamous Cell Malignancy
6 m.N and M Staging of Floor of Mouth Squamous Cell Malignancy
5 m.Marrow Infiltration and Perineural Infiltration in the Oral Cavity
5 m.Lesson
Lymph Node Levels of the Neck
7 topics, 24 min.
Lesson
Oropharynx
21 topics, 1 hr. 9 min.
Anatomy and Boundaries of the Oropharynx
4 m.Anatomy of the Tongue Base
4 m.Anatomy of the Palatine Tonsil
4 m.Anatomy of the Soft Palate
3 m.Anatomy of the Posterior Oropharyngeal Wall
3 m.Oropharyngeal SCC of the Base of Tongue
4 m.Oropharyngeal Carcinoma: Nodal Drainage and Differential Dx
5 m.Staging Oropharynx Cancer, T-staging
4 m.Staging Oropharynx Cancer, N-Staging
6 m.Oropharynx - Base of Tongue SCC: T-Staging
3 m.Base of Tongue Oropharyngeal Carcinoma, N & M Staging
3 m.Oropharynx - SCC of the Palatine Tonsil
4 m.Oropharynx - Palatine Tonsil SCC: Paths of Spread
5 m.Oropharynx - Lymphadenopathy and HPV-Related SCC
3 m.Oropharynx - Palatine Tonsil SCC - T Staging
4 m.Oropharynx - Palatine Tonsil SCC - N/M Staging
4 m.Oropharynx - SCC of the Soft Palate
3 m.Oropharynx - SCC: Paths of Spread and Differential Dx
4 m.Oropharynx - Soft Palate SCC: Nodal Drainage
2 m.Oropharynx - Soft Palate SCC - TNM Staging
3 m.Oropharynx - Base of Tongue Mucoepidermoid Carcinoma
5 m.Lesson
Hypopharynx
18 topics, 56 min.
Hypopharynx anatomy
4 m.Hypopharynx - The Piriform Sinus Anatomy
5 m.Hypopharynx - The Postcricoid Space Anatomy
4 m.Hypopharynx - The Posterior Hypopharyngeal Wall Anatomy
5 m.Hypopharynx - Piriform Sinus SCC
5 m.Hypopharynx - Piriform Sinus Carcinoma - Local Spread
4 m.Hypopharyngeal SCC - Nodal Drainage
3 m.Hypopharyngeal SCC - Differential Dx
2 m.Hypopharyngeal Carcinoma - T Staging
3 m.Hypopharyngeal SCC - N Staging
3 m.Hypopharynx - Piriform Sinus SCC - T Staging
5 m.Hypopharynx - Piriform Sinus SCC - N/M Staging
4 m.Hypopharynx - Postcricoid Space SCC
4 m.Hypopharynx - Postcricoid Space SCC - Local Spread
4 m.Hypopharynx - Postcricoid SCC - Differential Diagnoses
2 m.Hypopharynx - Postcricoid Space SCC: T Staging
3 m.Hypopharynx - Postcricoid Space SCC - N/M Staging
3 m.Hypopharynx - Changes in AJCC Staging Guidelines
4 m.Lesson
Larynx
18 topics, 1 hr. 3 min.
Larynx Anatomy
5 m.Larynx Anatomy: Supraglottic, Glottic, and Subglottic Sites
9 m.The Supraglottic Larynx
4 m.The Glottic Larynx.
3 m.The Subglottic Larynx
3 m.Laryngeal SCC - T Staging
7 m.Laryngeal SCC - Cartilage Invasion
4 m.Laryngeal SCC: Local and Nodal Extension
4 m.Supraglottic SCC- Differential Diagnoses
3 m.Laryngeal SCC: Glottic Origin
5 m.Larynx - Glottic SCC: Patterns of Local Spread
4 m.Laryngeal SCC of the Subglottis
3 m.Larynx - Subglottic Carcinomas: Patterns of Spread & Differential Dx
3 m.Laryngeal SCC: T Staging
4 m.Larynx - Glottic SCC: T Staging
3 m.Laryngeal SCC: N Staging
2 m.Glottic SCC: T Staging
4 m.Laryngeal SCC: N and M Staging
3 m.Lesson
Sinonasal
5 topics, 14 min.
Lesson
Perineural Tumor Spread
3 topics, 16 min.
0:01
Hello everyone, this is
0:03
Dr. Sidney Levy, continuing our discussion
0:05
of the anatomy of the hypopharynx.
0:08
I'd like to focus on the postcricoid region, which
0:12
is one of the three subsites of the hypopharynx.
0:15
I'd like to draw its boundaries for you first.
0:19
The postcricoid region or space is the
0:22
anterior wall of the lower hypopharynx.
0:26
It extends from the level of the arytenoid cartilages
0:31
to the inferior border of the cricoid cartilage.
0:34
This here is the inferior border of the cricoid cartilage.
0:38
This here is the level of the arytenoid cartilages,
0:42
which are best demonstrated on the axial projection.
0:47
Superior to the postcricoid space,
0:50
we have the laryngeal inlet, which is here.
0:54
Inferior to the postcricoid space,
0:57
we have the cervical esophagus, here.
0:59
Now, you may have noticed that the region
1:05
of the postcricoid space is abnormally
1:09
prominent on the sagittal projection.
1:11
And the reason for this is that there
1:13
is actually a malignancy in this region.
1:16
And they can be often very difficult to spot.
1:20
Often, all you will get is an abnormal thickening of the
1:25
anterior wall of the hypopharynx, as you have in this case.
1:28
But back to the anatomy.
1:30
Anterior to the postcricoid space,
1:32
we have the structures of the larynx.
1:34
That includes the laryngeal cartilages, specifically the
1:39
cricoid cartilage here, and the glottis, subglottis, and
1:44
supraglottis, so essentially the soft tissues of the larynx.
1:49
So the postcricoid space is small because
1:53
remember it doesn't include the posterior
1:55
wall of the hypopharynx at this level.
1:58
The posterior wall of the hypopharynx is here.
2:02
Therefore, the postcricoid space is actually a
2:05
very thin area of soft tissue and really only
2:09
constitutes this line of soft tissue here.
2:14
So in summary, the postcricoid region is
2:18
a small region which is easy to overlook.
2:21
It's best to think of it as the
2:22
anterior wall of the lower hypopharynx.
2:26
It may be seen often most easily on the sagittal
2:29
projection or the axial projection, but your key
2:32
landmarks are the arytenoid cartilages, which are
2:36
anterior to it, as part of the supraglottic larynx.
2:41
This here is the postcricoid space.
2:44
I will also draw the posterior hypopharyngeal wall.
2:50
Because the lumen is collapsed at this level, they
2:52
are often seen as a continuous soft tissue structure.
2:56
And it's best to help orient yourself using a
2:59
combination of the axial and the sagittal projections.
3:03
And remember the larynx is anterior,
3:05
the cervical esophagus is inferior, and the
3:09
posterior hypopharyngeal wall is posterior.
Hypopharynx - The Postcricoid Space Anatomy
HIDEInteractive Transcript
0:01
Hello everyone, this is
0:03
Dr. Sidney Levy, continuing our discussion
0:05
of the anatomy of the hypopharynx.
0:08
I'd like to focus on the postcricoid region, which
0:12
is one of the three subsites of the hypopharynx.
0:15
I'd like to draw its boundaries for you first.
0:19
The postcricoid region or space is the
0:22
anterior wall of the lower hypopharynx.
0:26
It extends from the level of the arytenoid cartilages
0:31
to the inferior border of the cricoid cartilage.
0:34
This here is the inferior border of the cricoid cartilage.
0:38
This here is the level of the arytenoid cartilages,
0:42
which are best demonstrated on the axial projection.
0:47
Superior to the postcricoid space,
0:50
we have the laryngeal inlet, which is here.
0:54
Inferior to the postcricoid space,
0:57
we have the cervical esophagus, here.
0:59
Now, you may have noticed that the region
1:05
of the postcricoid space is abnormally
1:09
prominent on the sagittal projection.
1:11
And the reason for this is that there
1:13
is actually a malignancy in this region.
1:16
And they can be often very difficult to spot.
1:20
Often, all you will get is an abnormal thickening of the
1:25
anterior wall of the hypopharynx, as you have in this case.
1:28
But back to the anatomy.
1:30
Anterior to the postcricoid space,
1:32
we have the structures of the larynx.
1:34
That includes the laryngeal cartilages, specifically the
1:39
cricoid cartilage here, and the glottis, subglottis, and
1:44
supraglottis, so essentially the soft tissues of the larynx.
1:49
So the postcricoid space is small because
1:53
remember it doesn't include the posterior
1:55
wall of the hypopharynx at this level.
1:58
The posterior wall of the hypopharynx is here.
2:02
Therefore, the postcricoid space is actually a
2:05
very thin area of soft tissue and really only
2:09
constitutes this line of soft tissue here.
2:14
So in summary, the postcricoid region is
2:18
a small region which is easy to overlook.
2:21
It's best to think of it as the
2:22
anterior wall of the lower hypopharynx.
2:26
It may be seen often most easily on the sagittal
2:29
projection or the axial projection, but your key
2:32
landmarks are the arytenoid cartilages, which are
2:36
anterior to it, as part of the supraglottic larynx.
2:41
This here is the postcricoid space.
2:44
I will also draw the posterior hypopharyngeal wall.
2:50
Because the lumen is collapsed at this level, they
2:52
are often seen as a continuous soft tissue structure.
2:56
And it's best to help orient yourself using a
2:59
combination of the axial and the sagittal projections.
3:03
And remember the larynx is anterior,
3:05
the cervical esophagus is inferior, and the
3:09
posterior hypopharyngeal wall is posterior.
Report
Description
Faculty
Sidney Levy, PhD, MBBS
Radiologist and Nuclear Medicine Specialist
I-MED
Tags
Neuroradiology
Neuro
Neoplastic
MRI
Head and Neck
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