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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.
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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.
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.
42 topics, 2 hr. 16 min.
Introduction to Intradural Extramedullary Lesions
4 m.Standard MRI Pulse Sequences for Evaluating Spinal Lesions
3 m.Cystic Lumbar Schwanoma
4 m.Lumbar Spine Solid Schwanoma vs. Meningioma
3 m.Cervical Spine Plexiform Neurofibroma in a Patient with NF1
6 m.Intradural Extramedullary Lesion Differential Diagosis
3 m.Nerve Sheath Tumors of the Spine
5 m.Neurofibromatosis Type 2
4 m.Neurofibromatosis Type 1
4 m.Spinal Meningiomas
5 m.Thoracic Spine Meningioma
4 m.Calcified Meningioma
3 m.Cervical Spine Meningioma
4 m.Cervical Spine Meningioma, Atypical Location
4 m.Spinal Hemangioblastomas
3 m.Multiple Hemangioblastomas, Von Hippel Lindau
4 m.Myxopapillary Ependymoma
4 m.Spinal Paraganglioma
2 m.Differential Diagosis of Intradural Metastasis
10 m.Subarachnoid Seeding from Medulloblastoma
4 m.Subarachoid Seeding in a Breast Cancer Patient
3 m.Spinal Lymphoma
2 m.Congenital and Developmental IDEM Cysts
8 m.Neurenteric Cysts
4 m.Transdural Herniation of the Spinal Cord
3 m.Spinal Arachoid Cyst
3 m.Prominent Transdural Herniation of the Spinal Cord
2 m.Fat Containing Spine Lesions
4 m.Lumbar Spine Lipoma
2 m.Pediatric Lumbar Lipoma and a Congenital Malformation
3 m.Lipoma vs. Fatty Infiltration of the Filum
3 m.Congenital Dural Ectasia
3 m.Dural Ectasia
2 m.Dural Arteriovenous Fistula Type 1
4 m.Dural AVF vs. Normal Variation
5 m.Review of Dural AVF Types II, III, and IV
3 m.IDEM Infectious and Inflammatory Abormalities
6 m.Guillian Barre Syndrome
3 m.Chronic Inflammatory Demyelinating Polyradiculoneuropathy
3 m.CIDP Causing Cauda Equina Syndrome
3 m.CIDP Causing Brachial Plexopathy
3 m.Indradural Extramedullary Processes - Conclusion
2 m.0:01
The other types of Spetzler vascular
0:04
malformations are much less common.
0:06
They include the Type II malformation in which there is
0:10
a true arteriovenous nidus within the spinal cord.
0:15
So the AVM nidus is in the cord.
0:17
It's intramedullary. However, they, too, may have enlarged
0:21
draining veins in the intradural extramedullary location.
0:26
This is the Type III or metameric type of vascular malformation.
0:30
In this case,
0:31
you may see arteriovenous malformation that is
0:35
within the bone, within the intradural extramedullary space,
0:40
as well as within the intradural intramedullary space.
0:44
So you're seeing portions that are in the
0:46
spinal cord outside the spinal cord,
0:48
but within the intradural space,
0:50
as well as outside the dura in the extradural space.
0:53
This is the so-called Type III juvenile metameric
0:57
Spetzler vascular malformation.
1:00
This is the Type IV vascular malformation.
1:02
In this case, it is truly an intradural extramedullary
1:07
abnormality. That is a fistula that is occurring outside
1:12
the spinal cord, within the dural space, showing both
1:17
enlarged artery and vein in the abnormality in
1:22
the intradural extramedullary location.
1:24
This is incredibly uncommon but is part
1:28
of that Spetzler classification.
1:30
Here is an example of a patient who has a hemorrhage
1:35
associated with a vascular malformation outside the
1:39
spinal cord presumed to be a Type IV fistula.
1:43
On this image, you see bright signal intensity from blood
1:46
products, as well as dark signal intensity
1:49
from high flow vascularity.
1:53
Here is the bright stuff which is the blood.
1:55
Here is the flow void, which is the
1:58
fistula between an artery and a vein
2:02
in the intradural extramedullary location.
Interactive Transcript
0:01
The other types of Spetzler vascular
0:04
malformations are much less common.
0:06
They include the Type II malformation in which there is
0:10
a true arteriovenous nidus within the spinal cord.
0:15
So the AVM nidus is in the cord.
0:17
It's intramedullary. However, they, too, may have enlarged
0:21
draining veins in the intradural extramedullary location.
0:26
This is the Type III or metameric type of vascular malformation.
0:30
In this case,
0:31
you may see arteriovenous malformation that is
0:35
within the bone, within the intradural extramedullary space,
0:40
as well as within the intradural intramedullary space.
0:44
So you're seeing portions that are in the
0:46
spinal cord outside the spinal cord,
0:48
but within the intradural space,
0:50
as well as outside the dura in the extradural space.
0:53
This is the so-called Type III juvenile metameric
0:57
Spetzler vascular malformation.
1:00
This is the Type IV vascular malformation.
1:02
In this case, it is truly an intradural extramedullary
1:07
abnormality. That is a fistula that is occurring outside
1:12
the spinal cord, within the dural space, showing both
1:17
enlarged artery and vein in the abnormality in
1:22
the intradural extramedullary location.
1:24
This is incredibly uncommon but is part
1:28
of that Spetzler classification.
1:30
Here is an example of a patient who has a hemorrhage
1:35
associated with a vascular malformation outside the
1:39
spinal cord presumed to be a Type IV fistula.
1:43
On this image, you see bright signal intensity from blood
1:46
products, as well as dark signal intensity
1:49
from high flow vascularity.
1:53
Here is the bright stuff which is the blood.
1:55
Here is the flow void, which is the
1:58
fistula between an artery and a vein
2:02
in the intradural extramedullary location.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Vascular Imaging
Vascular
Spine
Neuroradiology
Musculoskeletal (MSK)
MRI
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