case_images: PMC7139170_01
case_images: Ochronotic deposits within the carotid plaque and intima.
case_images: 10.1177_2050313X20915411-fig1.jpg
case_images: PMC7139170_01_10.1177_2050313X20915411-fig1.jpg
case_images: fig1-2050313X20915411
case_images: After carotid duplex showed high-grade (more than 80%) stenosis of right internal carotid artery (Figure 1), the patient was referred to vascular surgery for carotid endarterectomy.
case_images: H&E stain of carotid plaque:showing ochronotic (brownish) deposit near
  the intimal wall with stripped layers of tunica media to the far left.
  Atherosclerotic cholesterol plaque is depicted to the right of the
  ochronotic deposits. A dense cholesterol-rich core is in the center with
  right-sided pink-appearing thrombus.
case_images: 10.1177_2050313X20915411-fig2.jpg
case_images: PMC7139170_01_10.1177_2050313X20915411-fig2.jpg
case_images: fig2-2050313X20915411
case_images: He was noted to have an impressive heavily brown-black pigmented discoloration of the carotid plaque as depicted in Figure 2.
case_images: Preoperative ultrasound imaging. Left panel shows internal carotid artery
  high-grade stenosis with significant luminal stenosis. Right panel shows
  velocities in proximal internal carotid artery.
case_images: 10.1177_2050313X20915411-fig3.jpg
case_images: PMC7139170_01_10.1177_2050313X20915411-fig3.jpg
case_images: fig3-2050313X20915411
case_images: HGA deposits as black-brownish areas in the intima (Figure 3).