Fig 1.

Axial MR images in a 40-year-old male patient with a right frontal low-grade astrocytoma. Unenhanced axial T1-weighted spin-echo (A and C) and 3D MPRAGE MR images (B and D) of the first (A and B) and fifth (2 years later, C and D) gadolinium-enhanced MR imaging examinations at the level of the dentate nuclei of the cerebellum. The images show progressively increased T1 signal of the dentate nuclei (white arrows, C and D). Note that the qualitative analysis was slightly different between the 2 sequences.