PMC3633329_01
Preoperative plain radiographs show a left convex coronal curve of 86  from T8 to T12 (A) and thoracic kyphosis of 67  from T5 to T12 (B).
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F1
T5 to T12 (Figure 1). The correction rate of 31% on a lateral bending radiograph was considered a stiff curve. The spinal deformity was classified as type 1A+ according to the Lenke classification. Three-dimensional computed tomography revealed a wedge deformity of the vertebral body, although rotational deformation was mild (Figure 2).
Three-dimensional computed tomography reveals a wedge deformity of the vertebral body, although the rotational deformity was mild.
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F2
T5 to T12 (Figure 1). The correction rate of 31% on a lateral bending radiograph was considered a stiff curve. The spinal deformity was classified as type 1A+ according to the Lenke classification. Three-dimensional computed tomography revealed a wedge deformity of the vertebral body, although rotational deformation was mild (Figure 2).
The transcranial electric motor-evoked potentials were recorded with surface electrodes that were placed on both abductor hallucis muscles (AHM) and the right abductor pollicis muscle (APM). No patterns were recorded during the recording period of 100 ms (A), but leg potentials were recorded when the recording period was extended to 400 ms. The latency period was prolonged to 232 ms (B).
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F3
Potential waves were not recorded during the initial recording period of 100 ms (Figure 3A), but leg potentials were recorded after the recording period was extended 4-fold to 400 ms. Subsequently, during surgery, the potential remained stable (Figure 3B).
Postoperative antero-posterior (A) and lateral (B) radiographs that were conducted 2 years after the surgery show the corrected coronal curve (86  to 34  with a correction rate of 60%) and the corrected kyphosis (67  to 50 ).
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F4
The coronal curve and kyphosis were corrected from 86  to 34  (correction rate was 60%) and from 67  to 50 , respectively, at the 2-year follow-up (Figure 4).