Fig. 4

A 63-year-old male patient at the time of presentation with degenerative disc disease. Image workup demonstrated responsible lesion at L3/4. He was treated with XLIF. The L3/4 segments were treated with instrumentation using pedicle screws, and the position of cage was posterior. At the final follow-up, his ODI, VAS lumbar and leg pain scores had decreased from 20%, 5, 3 to 19%,3, 2 respectively. Cage subsidence was found in this case. Preoperative anteroposterior (A) and lateral (B) radiographs show typical radiologic findings of degenerative disc disease. Anteroposterior (C) and lateral (D) radiographs obtained immediate postoperatively and the latter illustrated a posterior cage position(c) posterior from the midpoint of inferior endplate(d). Anteroposterior (E) and lateral (F) radiographs acquired at final follow-up showed typical cage subsidence