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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.
Noon Conference (Free)
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
Emergency 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
This was a seven-month-old child who had spasticity
0:04
in the lower extremities, bilaterally.
0:06
We have the T1-weighted scan,
0:08
the STIR image and an axial T1-weighted scan.
0:12
As we look at the T1-weighted scan,
0:14
we see that we have a lesion that
0:16
is brightened signal intensity,
0:17
which is posterior to the spinal cord.
0:20
In what compartment is it located?
0:22
Well, we see that the CSF space is widened at the border
0:26
of the lesion and the spinal cord
0:28
is separate from the lesion.
0:29
And therefore we are in the intradural
0:32
extramedullary space.
0:34
The spinal cord is actually terminating
0:35
at an appropriate level,
0:37
so there is no tethering of the spinal cord.
0:40
And yet this lesion,
0:41
which is bright on T1 and suppresses on the
0:44
STIR image, is clearly containing fat,
0:46
and that's verified also on T1-weighted scan
0:50
without contrast, showing bright signal intensity.
0:52
On this scan, the spinal cord is being displaced anteriorly.
0:56
So this is an example of a lipoma in the
1:00
intradural extramedullary space without
1:03
associated spinal dysraphism.
Interactive Transcript
0:01
This was a seven-month-old child who had spasticity
0:04
in the lower extremities, bilaterally.
0:06
We have the T1-weighted scan,
0:08
the STIR image and an axial T1-weighted scan.
0:12
As we look at the T1-weighted scan,
0:14
we see that we have a lesion that
0:16
is brightened signal intensity,
0:17
which is posterior to the spinal cord.
0:20
In what compartment is it located?
0:22
Well, we see that the CSF space is widened at the border
0:26
of the lesion and the spinal cord
0:28
is separate from the lesion.
0:29
And therefore we are in the intradural
0:32
extramedullary space.
0:34
The spinal cord is actually terminating
0:35
at an appropriate level,
0:37
so there is no tethering of the spinal cord.
0:40
And yet this lesion,
0:41
which is bright on T1 and suppresses on the
0:44
STIR image, is clearly containing fat,
0:46
and that's verified also on T1-weighted scan
0:50
without contrast, showing bright signal intensity.
0:52
On this scan, the spinal cord is being displaced anteriorly.
0:56
So this is an example of a lipoma in the
1:00
intradural extramedullary space without
1:03
associated spinal dysraphism.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Spine
Neuroradiology
Neoplastic
Musculoskeletal (MSK)
MRI
Acquired/Developmental
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