Known CCM near brainstem, seen on outside imaging. There is a subcentimeter focus of susceptibility effect in the left periaqueductal region of the midbrain. There is no evidence of acute intracranial hemorrhage, mass, or acute infarct. There is no abnormal intracranial enhancement. 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, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
A subcentimeter focus of susceptibility effect in the left periaqueductal region of the midbrain may represent a cavernous malformation.