Follow up on abnormal CT scan findings: left leg numbness. There is a focus of susceptibility effect with central areas of T1 hyperintensity in the inferior pons that measures up to 9 mm with an associated developmental venous anomaly that extends to the prepontine cistern. There is no surrounding T2 hyperintensity. There is a cystic defect in the left parietal lobe that measures up to approximately 4 cm and communicates with the left lateral ventricle with a punctate focus of susceptibility effect along the anterior margin of the cystic defect and thinning of the overlying calvarium. There are also a smaller cystic defects in the parenchyma anterior to this lesion that do not communicate with the lateral ventricle. There is diffuse surrounding confluent T2 hyperintensity in the white matter, without associated mass effect. There is no midline shift or herniation. The orbits are unremarkable. There are right maxillary sinus retention cysts.
1. Subcentimeter pontine cavernous malformation with associated developmental venous anomaly, but no evidence of surrounding edema.2. Left parietal lobe porencephalic cyst with a punctate focus of chronic hemorrhage and adjacent cystic encephalomalacia and gliosis. 