[Preoperative portal embolization for induction of liver hypertrophy]

Preoperative portal embolization (PVE) is now widely used to induce hypertrophy of the anticipated liver remnant. Here, pathophysiology, indications, technical procedures, and problems of PVE are reviewed and our experience of 105 PVEs is presented. The reported complication rate after PVE is low (0-10%) and the increment of the future remnant liver volume is 12% of total liver volume (range: 7-27%). The resection rate after PVE ranged from 58% to 100%. In our series of 105 PVEs, the morbidity rate was 3.8%, the future remnant liver increased by about 10% of total liver volume, and 34 patients (32.4%) did not undergo planned extended hepatectomy. After hepatectomy, hepatic failure occurred in one patient (< 1%). In conclusion, although PVE is a safe procedure for enlarging the future remnant liver, more appropriate indication criteria should be established.