Fig. 4

Sequential radiologic findings in a previously healthy 49-year-old woman before admission to our institution (case 2). X-ray showed L4/5 internal fixation and fusion surgery (a and b). The original single-level infection(L4/5) was detected by MRI, approximately 40 days after the primary operation (c and d). Three months later, T1- and T2-weighted MRI showed the infection had progressed to L2/3 and L3/4 (e) and (f). Two months later, T1- and T2-weighted MRI showed the infection had progressed to L1/2 (g) and (h)