case_images: PMC6803722_01
case_images: Pre-operative X-rays of the knees.
case_images: CRIOR2019-1871856.001.jpg
case_images: PMC6803722_01_CRIOR2019-1871856.001.jpg
case_images: fig1
case_images: Intraoperative images of the right knee. Black discoloration is noted on the patella and trochlea (a), tibia (d), and menisci (c). The cancellous bone appears normal after preparation (b).
case_images: CRIOR2019-1871856.002.jpg
case_images: PMC6803722_01_CRIOR2019-1871856.002.jpg
case_images: fig2
case_images: Upon everting the patella, it was noted that the patella tendon, menisci, cruciate ligaments, and cartilage over femur, patella, and trochlea were black in colour (Figure 2).
case_images: Dark pigmentation at the sclera of the left (a) and right (b) eyes. In panel (c), the normal appearance of urine on the left turned dark on the right upon addition of sodium hydroxide.
case_images: CRIOR2019-1871856.003.jpg
case_images: PMC6803722_01_CRIOR2019-1871856.003.jpg
case_images: fig3
case_images: Subsequent physical examination revealed dark pigmentation of his sclerae (Figures 3(a) and 3(b)). His urine appeared normal, until the addition of sodium hydroxide turned it dark (Figure 3(c)).
case_images: Postoperative X-rays of the knees.
case_images: CRIOR2019-1871856.004.jpg
case_images: PMC6803722_01_CRIOR2019-1871856.004.jpg
case_images: fig4
case_images: The X-rays showed satisfactory position and alignment (Figure 4).