fig3

Figure 3. 49-year-old man with SNUC, pre/post IC (A and B) and post EES MRI images (C). (A) Pre-IC MRI of SNUC, 3 arrows point to dural involvement; (B) Post-IC MRI, 1 arrow points to the continued dural involvement; (C) Post-IC and EES with orbital exenteration MRI. SNUC: Sinonasal undifferentiated carcinoma; IC: induction chemotherapy; EES: endoscopic endonasal surgery; MRI: magnetic resonance imaging.