Proton beam therapy of periorbital sinonasal squamous cell carcinoma: Two case reports and review of literature

Figure 15 Complete tumor remission verified in the magnetic resonance imaging at 8 mo after proton beam therapy. A: Further regression of the tumorous enhancement in the right lacrimal sac marked with arrows; B: Postradiogenic changes of the right facial soft tissue with no evidence of residual tumor; C: Coronal presentation of the fully regressed right periorbital sinonasal cancer; D: Clearly defined orbital floor with normal position of the right eye.