(A) Axial CT (same patient as in Figure 13-10) just below the L4-5 disk space shows compression of the right anterolateral aspect of the thecal sac by.

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Presentation transcript:

(A) Axial CT (same patient as in Figure 13-10) just below the L4-5 disk space shows compression of the right anterolateral aspect of the thecal sac by the HNP (arrow). The image was obtained below the L4-5 disk space, indicating inferior migration of herniated disk material. (B) Axial T1-weighted MR image of a different patient shows a far lateral right-sided HNP (arrows) with replacement of normal foraminal fat by intermediate signal representing the disk. Note normal perineural fat (arrowheads) in the left neural foramen. A far lateral HNP such as this would probably be missed if only myelography were performed. (C) Sagittal T2-weighted image shows a midline disk herniation at C5-6 that is compressing the spinal cord (arrowheads). Source: Chapter 13. Imaging of the Spine, Basic Radiology, 2e Citation: Chen MM, Pope TL, Ott DJ. Basic Radiology, 2e; 2011 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/chen2/chen2_c013f013c.jpg&sec=39671507&BookID=360&ChapterSecID=39669023&imagename= Accessed: December 30, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved