Evaluate brainstem lesion, compare with previous: vomiting, brainstem lesion on previous exam. There is no appreciable residual abnormal signal in the left pons. There is no abnormal intracranial enhancement. There is no evidence of intracranial hemorrhage, mass, or acute infarct. 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, skull, and scalp soft tissues appear to be unremarkable. There is mild scattered paranasal sinus mucosal thickening.
No appreciable residual brainstem lesion.