Diffuse large B-cell lymphoma and PET with possible FDG avid lesion in the right cerebellum. There are small areas of encephalomalacia in the central pons, left periventricular cerebellar hemisphere, and left thalamus. In addition, there are scattered areas of high T2 signal in the bilateral cerebral white matter. However, there is no abnormal intracranial enhancement or mass. There is no evidence of intracranial hemorrhage or acute infarct. There is mild diffuse cerebral volume loss. There is no midline shift or herniation. The major cerebral flow voids are intact. There are mucosal retention cysts within the maxillary and sphenoid sinuses bilaterally. The orbits, skull, and scalp soft tissues are grossly unremarkable.
1. No evidence of intracranial mass or abnormal enhancement. 2. Chronic lacunar infarcts in the central pons, left periventricular cerebellar hemisphere, and left thalamus, superimposed upon a background of probable chronic small vessel ischemic disease.