Fig. 3

Pre- and post-operative imaging of thoracic OPLL with stenosis in a 65-year-old female patient (patient #18). a Preoperative CT showed OPLL at T1-4 (arrow, sagittal view). b Preoperative MRI showed spinal cord compression at segments T1-4 and yellow ligament hypertrophy at T3 (arrow, sagittal view). c Preoperative CT image showed ossification of PLL at the T2 level (arrow, cross-sectional view). d Postoperative CT image showed complete removal of the PLL at the T2 level (arrow, cross-sectional view). e Postoperative cross-sectional CT image showed a suspending PLL at the T3 level (arrow, cross-sectional view). f Postoperative CT image showed removal of 1/3 of the T1-4 vertebral bone and PLL (sagittal view)