PMC4314152_01
Transaxial CT scan showing a large polypoid intra-luminal mass involving the distal trachea and the carina, causing near total obliteration of the lumen. (A): Before radiotherapy, (B): After radiotherapy
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Contrast-enhanced CT scans demonstrated no paratracheal adenopathy or pulmonary parenchymal disease (Figure 1).
PMC4314152_02
Coronal reformatted CT image showing a large polypoid intra-luminal mass arising in the trachea within 1 cm of the larynx, causing obliteration of 70% of the lumen
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Chest CT was performed that showed a large polypoid intra-luminal mass arising in the trachea within 1 cm of the larynx, causing obliteration of 70% of the lumen (Figure 2).
Resected specimen showing a polypoid growth pattern. The tumor was present at 1 cm below the larynx
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ACC of the trachea. A resection of the first four tracheal rings and end-to-end anastomosis of the trachea was carried out (Figure 3).
Histologic specimen showing adenoid cystic carcinoma mixed with tubular and cribriform pattern (H&E, original magnification x 10)
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Histologically, ACC was diagnosed (Figure 4).
An axial (A) and coronal (B) figures shows the dose distribution of the radiation treatment plan. The plan uses five fields (anterior, right anterior oblique, left anterior oblique, right posterior oblique and left posterior oblique). Coloring wires shows the high dose (shown in yellow) and lower doses (shown in green and blue, respectively)
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Figure 5 shows the radiation treatment plan.