History significant for 5 or 6 sports related concussions with worsening headaches over past year and a prior head CT that showed an intracranial cyst. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There is mild asymmetry of the lateral ventricles, left larger than right, and a cystic defect that measures up to 18 mm in the left frontal lobe that communicates with the left lateral ventricle. Otherwise, the brain parenchyma and pituitary gland appear unremarkable. There is no abnormal intracranial enhancement. 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.
Small left frontal lobe porencephalic cyst. Otherwise, no evidence of acute intracranial hemorrhage, mass lesions, or acute infarcts.