Figure 1c. Patient 6. Typical pattern of angiocentric involvement with lymphomatoid granulomatosis in 53-year-old man. (a) Sagittal and (b) transverse postcontrast T1-weighted MR images (400/9) of the brainstem and (c) transverse postcontrast T1-weighted images (400/9) of the cerebral hemispheres show multiple punctate enhancing foci (arrows) in the corpus callosum, midbrain, pons, medulla, and proximal cervical cord. Edema also was present around these lesions; some are noted with arrows in (d) transverse T2-weighted MR image (2500/100). (e, f) Transverse postcontrast T1-weighted MR images (400/9) obtained after treatment show complete resolution of the enhancing lesions in the (e) brainstem and the (f) cerebral hemispheres.