15-year-old female with a headache with 5 out of 10 pain, dizziness, sensitive to light and sound for 3 -4 days after concussion. Evaluate for intracranial hemorrhage. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are scattered punctate to/flair hyperintensities in the left frontal lobe, which most likely represent gliosis along normal variant prominent perivascular spaces. The brain parenchyma otherwise appears unremarkable. There is a small area of extra-axial CSF signal intensity along the anterior right temporal pole probably represents a small arachnoid cyst. 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. There are upper limit of normal small bilateral occipital scalp lymph nodes bilaterally, presumably reactive. There is partial left sphenoid opacification.
No evidence of acute intracranial abnormality. Small probable incidental right middle cranial fossa arachnoid cyst.