正しくは↓ Casullo, Joseph, et al. "CT of the paraumbilical and ensiform veins in patients with superior vena cava or left brachiocephalic vein obstruction." Plos one 13.4 (2018): e0196093.
Fig 7. Visual model of the arrangement and systemic anastomoses of collateral paraumbilical veins. The potential collateral pathways between the systemic and paraumbilical veins are shown. Only the left epigastric and subcutaneous vessels are included. An inferior vessel (arrowhead) terminates at the umbilical notch and receives tributaries continuous with ensiform veins, and deep epigastric and subcutaneous veins, which cross the rectus sheath or linea alba (not shown). The ensiform veins descend from a transverse branch of the internal thoracic veins at the xiphoid process. The patent part (arrow) of the umbilical vein (UV) also receives an inferior vein with its tributaries. The obliterated umbilical vein joins the umbilicus. The superior veins communicate with diaphragmatic branches of the internal thoracic, anterior mediastinal and pericardiacophrenic veins. (Visual model created by MUHC Patient Education Office).
