One-Step Posterior and Anterior Combined Approach for L5 Retroperitoneal Schwannoma Eroding a Lumbar Vertebra

Figure 3

Intraoperative exposure of the tumor. The mass was firmly impinged to the bone and to the posterior aspect of the common iliac vein in its passage to extern iliac vein. In order not to damage the iliac veins and to save the hypogastric vein, the last lumbar vein was tied and the vena cava was raised and moved laterally.