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

Figure 7 Persisting tumor remission evidenced in the positron emission tomography with 2-deoxy-2--fluorine-18-fluoro-D-glucose/computed tomography and magnetic resonance imaging at 20 mo after proton beam therapy. A: No pathologically increased activity in the positron emission tomography, overview image; B: Absence of increased fluoro-D-glucose avidity in the nasal bridge (arrow-marked in positron emission tomography/computed tomography); C: Absence of metabolically active tumor in the nostrils; D: Flat surface above the nasal bridge in the magnetic resonance imaging; E: No evidence of tumor enhancement in the nasal bridge, presented in coronal plane.