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Figure 4: Pulmonary metastatic lesion of UESL. (a) CT of the thorax showed a well-defined solid nodular lesion (arrow) in the left lower lobe. (b, c) Histological examination of the lung lesion. (d) The uninvolved pulmonary parenchyma (to upper right of the center) is compressed. (e, f) Bronchioles entrapped within and at the periphery of the tumor. An isolated bronchiole is surrounded and focally destroyed by the infiltrating tumor (f) (arrow) (hematoxylin and eosin stain; original magnification: (f) ×40; (d) and (e) ×100; (b) and (c) ×200).