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A 53-year-old man with a history of recurrent PE during 2008–2010, under long-term warfarin (Coumadin) therapy, had an incidental finding of a small subpleural part-solid ground-glass nodule (GGN) in the right upper lobe from a screening CT in December 2013 (figure 1A). The first follow up CT in April 2014 showed no significant interval change. The second follow-up CT in October 2014 showed enlargement of the part-solid GGN with pleural retraction (figure 1B), and malignancy was suspected. Video-assisted thoracoscopic wedge resection of the part-solid GGN was performed in November 2014.