FIG 6. Case 10, 45-year-old man with low-grade B-cell lymphoma (no further histologic specification; arrows) with bifrontal hyperintense periventricular white matter lesions on A, T2-weighted, and B, FLAIR images. C, The lesions are not visible on T1-weighted precontrast imaging. D, No contrast enhancement is noted on the T1-weighted postcontrast section. E, This T2-weighted image additionally demonstrates a small area of hyperintensity located in the head of the corpus callosum.