Fig. 1

A 70-year-old female patient visited for the lumbago she experienced after she slipped at home. There was a suspected L1 vertebral body fracture based on the lateral plain radiograph (a). A recent fracture in T1WI and T2WI (b, c) was confirmed based on the MRI. After KP, the vertebral height was restored up to 67 % from 45 % before the procedure and the local kyphotic angle was improved from 8.3 ° down to 1.9 ° (d). However, at 1-year follow-up (e), osteolysis (arrow) was found around the cement inserted. The vertebral height reduced by 54 % and the local kyphotic angle worsened up to 7.9 ° compared with post-operational figures