Solitary sporadic left pontine lesion: yearly follow-up. There is a multilocular left pons cavernous malformation that measures up to 10 mm, which is not significantly changed. There is no evidence of acute hemorrhage or associated vasogenic edema. However, there is an associated developmental venous anomaly within the left pons and midbrain. There is no evidence of acute infarct. The ventricles and basal cisterns are stable in size and configuration. There is no midline shift or herniation. There is minimal scattered paranasal sinus mucosal thickening. The skull and extracranial soft tissues are unremarkable.
No significant interval change in the left pons cavernous malformation and associated developmental venous anomaly.