A 59-year-old male with a history (2.5 years ago) of head and neck sinonasal undifferentiated carcinoma (SUNC) was presented with progressively worsening back pain and bilateral lower extremity paresis numbness. The patient denied upper extremity weakness, saddle anesthesia, or bowel and bladder dysfunction. Axial MR imaging was performed (CT and T2-weighted MR images are attached). What complication do these MR images indicate?

*This case is from Docplexus editorial team for educative purpose only. Source: Case Reports In Oncology. Stay Connected, the answer will be posted in the next 48h!