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

Figure 1

Preoperative spinal CT scan without contrast. The mass widened the omolateral conjugate foramen (a) and extended to the sacrum and to the ipsilateral sacroiliac joint eroding the right posterolateral portion of the L5 vertebral body (b, c).

(a)

(b)

(c)