(Upper panels) Intravascular ultrasound (Atlantis; Boston Scientific); (lower panels) optical coherence tomography (LightLabImaging, Boston, Massachusetts; cross-sectional and longitudinal view). (A) Distal reference showing eccentric plaque in 11 to 4 o'clock position. (B) Distal stent portion showing a well-expanded and apposed stent with thin tissue coverage by optical coherence tomography that is missed by intravascular ultrasound. (C) Irregular lumen borders with intraluminal remnants of the thrombus. (D) Proximal stent edge with incomplete apposition of 5 stent struts (arrows) against the vessel wall. The distance to the vessel wall is 200 μm. Optical coherence tomography shows tissue around the stent struts (differential diagnosis thrombus, neointima). Incomplete stent apposition may be caused by initial malaposition or acquired malaposition caused by a vascular response to the stent. C = catheter artifact; GWA = guidewire artefact.