CNS recurrence of DLBCL status post 2 cycles of MTR chemotherapy, in need of restaging. There has been interval decrease in size of the infiltrative enhancing mass involving the bilateral basal ganglia, hypothalami, columns of the fornices, and perhaps the anterior commissure, now measuring up to approximately 22 mm, previously 32 mm. There are right transfrontal post-biopsy findings with associated areas of susceptibility effect. There is no evidence of acute infarction. There is decreased effacement of the anterior third ventricle. The lateral ventricles are not significantly changed. There is no midline shift or herniation. The major cerebral flow voids are intact. The skull, paranasal sinuses, and scalp soft tissues are unchanged.
Interval decrease in size of the CNS lymphoma, indicating treatment response. 