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

Figure 14 Pronounced tumor reduction in the first follow-up magnetic resonance imaging scan. A: Dwindling of enhancing tumor nodules at the right naso-orbital corner; B: Decreased enhancement in the soft tissue of the naso-labial fold and zygomatic area; C: Significant regression of the right periorbital sinonasal cancer, presented in coronal plane; D: Restored delimitation of the right orbital floor, presented in sagittal plane. Former tumor extent marked with arrows.