case_images: PMC8761820_01
case_images: PMC8761820_02
case_images: PMC8761820_03
case_images: PMC8761820_04
case_images: Changes in ammonia levels are shown for case 4. Large circadian variation is shown in the
  same disease one day before and one day after hemodialysis, and the ammonia level decreases
  after hemodialysis. Arrows in the figures indicate embolization. No apparent increases were
  observed after embolization.
case_images: fmj-7-139-g001.jpg
case_images: PMC8761820_04_fmj-7-139-g001.jpg
case_images: F1
case_images: Changes in ammonia level for case 4 are shown in Figure 1. However, the ammonia level not only decreased, but also did not fluctuate after embolization (Figure 1).
case_images: Plain abdominal CT and 3D CT angiography for case 4. Abnormal vessels were found from the
  splenic vein to the left renal vein in case 4.
case_images: fmj-7-139-g002.jpg
case_images: PMC8761820_04_fmj-7-139-g002.jpg
case_images: F2
case_images: Conservative treatment was somewhat successful in all patients, but a recurrence of symptoms was observed, and clear improvements were observed after embolization (Figure 2 and Figure 3).
case_images: Angiography before and after balloon-occluded retrograde transvenous obliteration (B-RTO) in
  case 4. The abnormal vessel recognized before the treatment was not depicted by the
  embolization. Reprinted with permission of Ref. 4.
case_images: fmj-7-139-g003.jpg
case_images: PMC8761820_04_fmj-7-139-g003.jpg
case_images: F3
case_images: Conservative treatment was somewhat successful in all patients, but a recurrence of symptoms was observed, and clear improvements were observed after embolization (Figure 2 and Figure 3).