A, Atherectomy site in a patient who died 12 hours after intervention. Note eccentric atheromatous plaque (P), an area of tissue resection (between short arrows), and a partially organized thrombus adherent to the base of the resection site (arrowhead) with a fresh luminal extension. (Hematoxylin and eosin.) B, This atherectomy site shows that the tissue resection extended to the interna elastic lumina (arrow). (Verhoeff–van Gieson's stain.) C, Higher magnification reveals the depth of the resection and the partially organized base of the luminal thrombus (arrow). (Verhoeff–van Gieson elastic stain) [52]. (Courtesy of William D. Edwards, MD, FACC.)