A 47-year-old man underwent a chest CT that incidentally discovered a mediastinal mass. Upon examination, doctors found that the man had a B2 thymoma, a type of thymus tumor, that contained squamous cell carcinoma. The squamous cell carcinoma had arisen within the pre-existing B2 thymoma.

1. Chest CT A 47-year-old man with mediastinal mass, incidentally founded

2. Gross finding

3. Close view Squamous cell carcinoma arising in B2 Thymoma

4. Close view B2 thymoma Squamous cell carcinoma

5. Low power view B2 thymoma Squamous cell carcinoma

6. B2 thymoma area B2 thymoma

7. Sq C Ca Squamous cell carcinoma

8. Sq C Ca Squamous cell carcinoma