Figure 2. (A) The computed tomography (CT) scan shows the tips of two needles through the intervertebral disc at the level of T12-L1 (X, ipsilateral approach, L-L type; Y, contralateral approach, L-R type;*, osteophyte). We placed the needle "X" to posterior wall of the aorta because of the danger of kidney puncture in this case. The scale indicates 5 cm. (B) Arrows indicate the spread of contrast medium around the aorta in the same patient as A. The scale indicates 5 cm.