Figure 3b. Testicular seminoma in a 51-year-old man with a palpable mass in the right testis. (a) Axial T2-weighted MR image shows a solid mass in the right testis. The mass has a lobulated margin and uniform signal intensity. Bandlike structures of low signal intensity (arrows), which represent fibrovascular septa, are seen within the mass. (b) Axial contrast material-enhanced MR image shows that the septa (arrows) enhance more than the tumor tissue. This finding indicates that the septa include a large amount of vascular structures.