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Indradural Extramedullary Processes - Conclusion

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In considering intradural extramedullary processes,

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the neoplastic category really predominates in the

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pathology that we see on a day to day basis.

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And those neoplasms that are in the intradural

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extramedullary space are dominated by neurogenic tumors,

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with schwannomas more common than neurofibromas

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and the meningiomas. So, benign conditions.

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There are a number of congenital

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lesions that we discussed,

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including cystic lesions, be it arachnoid cyst,

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neurenteric cyst,

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epidermoid cysts and dermoid cysts, as well as lesions

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that contain fat, as in lipomas or fatty infiltration of

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the filum or lipomeningoceles, or lipomyelomeningoceles.

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Overall, with respect to the infectious etiologies,

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this will be dominated by viral infections and they may

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be manifested by polyneuropathies or polyradiculopathies.

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The vascular malformations are pretty uncommon,

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but what we see in the intradural extramedullary

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space generally are enlarged veins.

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As a manifestation of the most common of these,

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the dural-based, arteriovenous fistula.

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As I said,

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we usually are dealing with benign conditions in the

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intradural extramedullary space, as opposed to the

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neoplasms that may occur in the spinal cord itself.

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So I appreciate your attention,

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and thank you once again.

Report

Description

Faculty

David M Yousem, MD, MBA

Professor of Radiology, Vice Chairman and Associate Dean

Johns Hopkins University

Tags

Vascular

Trauma

Syndromes

Spine

Non-infectious Inflammatory

Neuroradiology

Neoplastic

Musculoskeletal (MSK)

Metabolic

MRI

Infectious

Idiopathic

Iatrogenic

Drug related

Congenital

Acquired/Developmental

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