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

Figure 9 Continuously growing tumor lesion in the right lacrimal sac invading the adjacent orbit and sinonasal spaces, presented as magnetic resonance imaging. A: Initial tumor extent in the antero-medial recess of the right maxillary sinus in June 2017; B: Size progression in December 2017, presented in axial plane; C: Distinct tumor invasion of the right orbit and neighboring sinonasal spaces, presented in coronal plane. Tumor marked with arrows.