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Training Collections
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Black Friday Save 30%Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
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Black Friday Save 40%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)
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Dr. Resnick's MSK Conference
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Lower Extremities MRI Conference
Musculoskeletal Imaging
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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.
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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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