Undifferentiated carcinoma with prominent lymphocytic infiltration (so-called lymphoepithelioma) in the trachea.

This report presents a case of tracheal undifferentiated carcinoma with marked lymphocytic infiltration. The tumor was histologically similar to the so-called lymphoepithelioma of the nasopharyngeal region. After resection of the tumor, radiotherapy was performed. No recurrence has been found for six years. To our knowledge, this so-called lymphoepithelioma in the trachea is the first case reported in the literature.