Fig. 2. Gadolinium-enhanced T1 sagittal and axial images of lumbar magnetic resonance image. A 64-year-old male patient (No. 7 in Table 1) had surgical site infection after pedicle screws fixation at bilateral L2 to L4, enhancing area was noted below the L4 level in sagittal image (A; white arrow), artifact signals interrupted analyzing subcutaneous tissues and enhancing area was only noted at right psoas muscle (B; white arrow).