There is a carcinoma arising from the bronchus to the left lower lobe which has extended to occupy
much of the upper portion of the lobe. It has further invaded the mediastinal tissues with, close to
its origin, compression of a vein. The discrete ovoid and rounded areas in which carbon pigment
can be seen are lymph nodes involved by the tumour. On the reverse side of the specimen
compression of the superior vena cava can be demonstrated.