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Fig. 2B. —70-year-old man with lung cancer and silent pulmonary embolism in segmental artery of right lower lobe. CT scans obtained 3 months later show progression of pulmonary embolism with multiple filling defects in segmental arteries of right lower lobe (B) and in right middle and inferior lobar arteries (C). Pulmonary embolism was correctly diagnosed at this time.