May Case of the Month Clinical History:

A middle-aged man of Asian descent had an incidental pulmonary nodule progress to a 3 cm solid well-circumscribed mass on follow-up. Investigations for infectious etiologies were negative. There was no history of smoking, no other lesions identified in imaging, and no other significant history.

The patient underwent lobectomy, and gross examination showed a solid round well-circumscribed mass. The figures show low and high power H&E morphology of the tumor (Figure 1 and 2 respectively), and p40 (Figure 3), TTF1 SPT24 (Figure 4) and TTF1 8G7G3/1 (Figure 5) immunohistochemistry. In situ hybridization for EBER is shown in Figure 6.

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