20 years, Male, headache. Brain parenchyma appears within normal limits. No parenchymal signal abnormality. No intracranial mass or mass-effect. No intracranial hemorrhage. No restricted diffusion to suggest acute ischemia. The ventricles are within normal limits in size and configuration. Cerebellar tonsils are borderline low without evidence of Chiari I malformation.No abnormal parenchymal or meningeal enhancement. Major flow-voids are preserved. Sella and orbits are grossly within normal limits. There is moderate degree of mucosal thickening involving the left frontal sinus, frontoethmoidal recesses, and left anterior ethmoid air cells. There is also minimal left maxillary sinus mucosal thickening. Bone marrow signal and remainder of the extracranial soft tissues are within normal limits.
1. Brain parenchyma appears within normal limits.2. Moderate degree of opacification involving the left frontal sinus and left anterior ethmoid air cells.