Figure 1.

Positron emission tomography/computed tomography maximal intensity projection (a), fused axial (b and c) images showing increased tracer uptake in the tracheal lesion and lung nodules (arrows) suggesting metastatic involvement. Microphotograph (d) of tracheal lesion biopsy showed the tumor with ulcer and necrosis (H and E, ×50). Microphotograph (e) showing clusters of pale round to oval cells with centrally placed mildly pleomorphic hyperchromatic nuclei with moderate amount of cytoplasm separated into small lobules by fibrocollagenous tissue, confirming tracheal metastasis (H and E, ×450)