Figure 1.

Thoracic computed tomography images that show no clear vessel invasion by non-small-cell lung tumours. (A) Central tumour with infiltration of main carina and both main bronchi but no evident infiltration of large central blood vessels; (B) Central tumour with direct infiltration of the mediastinum but no clear infiltration of central blood vessels; (C) Central tumour touching without sign of pulmonary artery infiltration. The presence of an atelectasis makes the interpretation difficult and may necessitate multiplanar reconstructions to aid decision making.