PMC5505615_01
Pretreatment 2.5 cm contrast-enhancing mass in the right lower lobe (A). Volumetric modulated arc therapy plan with the planning target volume (B). Dose distribution with isodose lines, from 100% to 30% (C). Complete tumor response 2 months after treatment (D).
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Chest computed tomography (CT) revealed multiple fluid-containing bullae and a contrast-enhancing 2.5 cm mass with a lobulated margin in the right lower lobe of the emphysematous lung (Figure 1A). A volumetric modulated arc therapy plan was created using the Eclipse treatment-planning system (Varian Medical Systems) and 6 MV photons, with inhomogeneity corrections (Figures 1B and C). A complete tumor response to SABR was observed on chest CT 2 months after the SABR (Figure 1D).