PTLD outside the CNS. There is an unchanged patchy area of T2 hyperintensity in the periventricular white matter adjacent to the left frontal horn, which measures up to 10 mm. There is also milder T2 hyperintensity diffusely in the periventricular white matter diffusely. Otherwise, there is no evidence of acute infarct or mass. There are a few subcentimeter foci of susceptibility effect in the bilateral cerebral hemispheres. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable. The bone marrow of the skull appears to be unchanged.
1. Unchanged nonspecific patchy area of T2 hyperintensity in the periventricular white matter adjacent to the left frontal horn. Otherwise, no convincing evidence of CNS PTLD, although assessment is limited due to the lack of intravenous contrast.2. A few subcentimeter foci of susceptibility effect in the bilateral cerebral hemispheres are nonspecific, but may represent chronic microhemorrhages. 