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

Figure 3 Positron emission tomography with 2-deoxy-2-fluorine-18-fluoro-D-glucose/computed tomography validated tumor recurrence in the nasal bridge and left parotid gland. A: Positron emission tomography overview image; B: Increased uptake in the nasal bridge; C: Fluoro-D-glucose-avid tumor in the nostrils (recurrent tumor marked with arrows).