case_images: PMC7339078_01
case_images: Venous duplex Doppler examination: (a) The blood flow shows an arterial flow pattern.
  (b) The white arrow indicates arteriovenous fistulas. (c) The blood flow shows an
  arterial flow pattern again. (d) The white arrow indicates mild stenosis in the common
  iliac vein.
case_images: 10.1177_2050313X20938222-fig1.jpg
case_images: PMC7339078_01_10.1177_2050313X20938222-fig1.jpg
case_images: fig1-2050313X20938222
case_images: Ultrasound showed no DVT, but the arterial flow pattern indicated venous blood flowing back into the toe (Figure 1(a)) and diffuse iliac AVFs (Figure 1(b)).
case_images: Angiography of the lower left extremity: (a) Arteriovenous fistulas in the common iliac
  artery and vein. (b) Arteriovenous fistulas in the internal iliac artery and vein. (c)
  The common iliac vein was occluded. (d) The left common iliac vein was patent.
case_images: 10.1177_2050313X20938222-fig2.jpg
case_images: PMC7339078_01_10.1177_2050313X20938222-fig2.jpg
case_images: fig2-2050313X20938222
case_images: Lower left extremity angiography showed the presence of multiple AVFs in the common and internal iliac arteries (Figure 2(a) and (b)) and the occluded common iliac vein (Figure 2(c)). Balloon angioplasty was performed, and anterograde blood flow and sufficient acute gain were obtained (Figure 2(d)).