Fig. 3. Change in PVST before and after the surgery. (A) Before surgery, the narrowest PVST (2.9 mm) was located in the C4 upper endplate, and the preoperative DOSS score was 5. (B) Anterior osteophytectomy was performed, and PVST changed to 5.7 mm at postoperative 1 month. Symptoms had also improved (DOSS=6). (C) Five years after surgery, bony spur regrowth with a narrowing of PVST (2.6 mm) was noted, and dysphagia occurred again (DOSS=5). PVST, prevertebral soft tissue thickness; DOSS, Dysphagia Outcome and Severity Scale.
