Fig. 2
Lateral radiographs (a) showing an aggressive gas-forming lesion around the lumbar paravertebral area (black arrow). Sagittal and coronal computed tomography (b and c) scans showing aggravating subcutaneous emphysema in the psoas muscle (white arrows) and paravertebral muscle as well as in the lumbar epidural space. Sagittal magnetic resonance imaging (d) showing aggressive dissemination of multifocal fluid pockets containing innumerable air bubbles in the paraspinal area, whole lumbar area (white arrows), and epidural space (white dotted arrows), which disseminated into the T5 level (white arrow) (e)