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Training Collections
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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.
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.
Dr. Resnick's MSK Conference
Learn directly from the MSK Master himself.
Lower Extremities MRI Conference
Musculoskeletal Imaging
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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.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
Lesson
Orbital Imaging Protocols
4 topics, 10 min.
Lesson
Orbit Anatomy
10 topics, 19 min.
Lesson
Case Review - Ocular Pathology
17 topics, 1 hr. 11 min.
Anterior Globe Rupture with Laterally Dislocated Cataract
4 m.Foreign Body in Globe
4 m.Wood Foreign Body and Ocular Hypotony
2 m.Hemmorhage in Both Chambers, Open Globe
3 m.Staphyloma
4 m.Persistent Hyperplastic Primary Vitreous (PHPV)
5 m.Retinal Detachment
3 m.Retinoblastoma on CT
4 m.Retinoblastoma on MRI
9 m.Bilateral Retinoblastoma
7 m.Ocular Pathology - Review
11 m.Endophthalmitis
3 m.PHPV Review, Coloboma, and Staphyloma
5 m.Phthisis Bulbi, Macrophthalmia, and Microphthalmia
4 m.Ocular Calcification
4 m.Retinoblastoma - Review
5 m.Choroidal Melanoma
3 m.Lesson
Case Review - Intraconal Pathology
15 topics, 1 hr. 8 min.
Intraconal, Conal and Extraconal Anatomy
1 m.Intraconal Hemangioma
5 m.Venous Vascular Malformation
3 m.Optic Nerve Glioma, NF1
4 m.Optic pathway glioma (pilocytic astrocytoma)
4 m.Optic Neuritis, Multiple Sclerosis
6 m.Optic Neuritis, Multiple Sclerosis (2)
7 m.Neuromyelitis Optica Spectrum Disorder
5 m.Neuromyelitis Optica With Spinal Cord Involvement
3 m.Optic Nerve Sheath Meningioma
5 m.Bilateral Optic Neuritis, Leukemia
6 m.Intraconal Pathology - Review
11 m.Optic Neuritis - Review
5 m.Optic Nerve Glioma - Review
4 m.Optic Nerve Sheath Meningioma - Review
6 m.Lesson
Case Review - Conal Lesions
5 topics, 16 min.
Lesson
Case Review - Extraconal Injuries and Abnormalities
18 topics, 55 min.
Extraconal Pathology - Introduction
1 m.Periorbital Cellulitis & Abscess
4 m.Type 3 Orbital Infection
3 m.Solitary Fibrous Tumor
4 m.Langerhans Cell Histiocytosis
2 m.Juvenile Ossifying Fibroma
2 m.Perineural Spread of Squamous Cell Carcinoma
5 m.Proptosis from Extraosseous Extension of Prostate Metastasis
3 m.Orbital Floor Fracture
5 m.Orbital Floor Fracture with Muscle/Fat Herniation
4 m.Orbital Floor Fracture: Status Post Repair
2 m.Bilateral Orbital Fracture Repair
2 m.Periorbital Cellulitis - Review
5 m.Orbital Pseudotumor - Review
3 m.Orbital Wall Abnormalities - Review
3 m.Orbital Fracture - Review
7 m.Giant Cell Reparative Granuloma
3 m.Granulomatous Sinusitis with IgG4-related Ophthalmic Disease
4 m.Lesson
Case Review - Orbital Appendage Pathology
6 topics, 19 min.
0:00
This is a companion case to the solitary fibrous
0:04
tumor that was demonstrated earlier.
0:06
Here we have a mass which is in an extra-axial
0:11
location and is invading the top of the orbit.
0:15
We note that it is relatively low in signal intensity on T1-weighted scans.
0:20
It's also low in signal intensity on the T2-weighted scan.
0:23
And yet it shows avid contrast enhancement.
0:26
So this has imaging features very much
0:28
like the solitary fibrous tumor.
0:30
The differential diagnosis here would
0:32
include a calcified meningioma,
0:35
which would also be an extra-axial lesion that
0:37
may have, for example, this CSF cleft sign.
0:41
However, this lesion is from the bone and that is best
0:45
demonstrated on the coronal imaging.
0:48
On this coronal image, one can see that the
0:52
lesion is infiltrating the orbital roof and has
0:57
a component which is in the extra-axial
1:00
compartment of the brain but is also growing into the orbit.
1:05
This case went to surgery and this was a
1:08
juvenile ossifying fibroma. Unfortunately,
1:11
many of these fibrous lesions can be quite
1:14
tricky and have similar signal intensity characteristics.
1:18
So the solitary fibrous tumor and the juvenile
1:21
ossifying fibroma in this case had the identical imaging features.
1:26
The solitary fibrous tumor has malignant potential.
1:29
The juvenile ossifying fibroma does not.
Juvenile Ossifying Fibroma
HIDEInteractive Transcript
0:00
This is a companion case to the solitary fibrous
0:04
tumor that was demonstrated earlier.
0:06
Here we have a mass which is in an extra-axial
0:11
location and is invading the top of the orbit.
0:15
We note that it is relatively low in signal intensity on T1-weighted scans.
0:20
It's also low in signal intensity on the T2-weighted scan.
0:23
And yet it shows avid contrast enhancement.
0:26
So this has imaging features very much
0:28
like the solitary fibrous tumor.
0:30
The differential diagnosis here would
0:32
include a calcified meningioma,
0:35
which would also be an extra-axial lesion that
0:37
may have, for example, this CSF cleft sign.
0:41
However, this lesion is from the bone and that is best
0:45
demonstrated on the coronal imaging.
0:48
On this coronal image, one can see that the
0:52
lesion is infiltrating the orbital roof and has
0:57
a component which is in the extra-axial
1:00
compartment of the brain but is also growing into the orbit.
1:05
This case went to surgery and this was a
1:08
juvenile ossifying fibroma. Unfortunately,
1:11
many of these fibrous lesions can be quite
1:14
tricky and have similar signal intensity characteristics.
1:18
So the solitary fibrous tumor and the juvenile
1:21
ossifying fibroma in this case had the identical imaging features.
1:26
The solitary fibrous tumor has malignant potential.
1:29
The juvenile ossifying fibroma does not.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Pediatrics
Orbit
Neuroradiology
Neuro
Neoplastic
Musculoskeletal (MSK)
MRI
Head and Neck
Brain
Bone & Soft Tissues
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