Dura-arachnoid lesion produced with 29-G Quincke needle Dura-arachnoid lesion produced with 29-G Quincke needle. Epidural surface. Scanning electron microscopy. Magnification ×200. (Reproduced with permission from Reina MA, Castedo J, López A. Cefalea pospunción dural: Ultraestructura de las lesiones durales y agujas espinales usadas en las punciones lumbares. Rev Arg Anestesiol. 2008 Jan-Mar 66(1):6-26.) Source: Ultrastructural Anatomy of the Spinal Meninges and Related Structures, Hadzic's Textbook of Regional Anesthesia and Acute Pain Management, 2e Citation: Hadzic A. Hadzic's Textbook of Regional Anesthesia and Acute Pain Management, 2e; 2017 Available at: http://accessanesthesiology.mhmedical.com/DownloadImage.aspx?image=/data/books/2070/hadzic2_ch6_f029.png&sec=157598926&BookID=2070&ChapterSecID=157598886&imagename= Accessed: December 31, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved