Fig. 3

Weinstein, Boriani, Biagini (WBB) classification is divided into 12 sections with the central cord as the center, in a clockwise direction, starting from the spinous processes. The first region is the spinous process, the sixth region is the anterior vertebral corpus, and the 12th region is the right spinous process: (A) surrounding soft tissue, (B) intraosseous, (C) involving the vertebral canal, (D) located in the epidural space, (E) dura involvement, and (F) vertebral artery involvement