14-year-old with history of Guillain Barre and left temporal lobe masslike lesion: 3 month follow-up exam. There is persistent diffuse T2 hyperintensity in the head and body of the left hippocampus associated with minimal swelling and poorly defined internal architecture. There is no associated restricted diffusion or contrast enhancement. There is no abnormal signal or enhancement elsewhere in the brain. There is no evidence of intracranial hemorrhage or acute infarction. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major intracranial vascular flow voids are intact. There is a small amount of residual mucosal thickening in the left sphenoid sinus. The orbits are unremarkable.
1. Persistent left hippocampus lesion. Differential considerations include a low grade neoplasm and a form of dysplasia, for example.2. Diminished findings related to sinusitis.