Figure 1: A. Case 1. Preoperative, axial, T1-weighted, Gd-enhanced, MR image demonstrating a well-marginated, enhanced tumor in the left thalamus. B. Case 1. Postoperative plain CT demonstrating a small hemorrhage in the left thalamus after stereotactic biopsy (arrow). C. Case 2. Preoperative, axial, T2-weighted, MR image demonstrating a massive, diffuse, pontine glioma. D. Postoperative, axial, T2-weighted, MR image demonstrating a high-intensity area after stereotactic biopsy (arrow).