Ventricles and extra-axial spaces: Appropriate for age.
Visualized paranasal sinuses: Mild mucosal thickening of the left posterior ethmoid air cells.
Mastoid air cells: Clear.
Bones: No acute osseous abnormality. No soft tissue findings are demonstrated to suggest recent trauma.
Additional comment: Bilateral lens replacements.
1. Irregular hypodense region in the right parietal lobe with suspected associated blood products is nonspecific and indeterminate. This may represent ischemic, inflammatory, posttraumatic (although no corroborative findings of soft tissue or calvarial trauma are identified, there is evidence of sulcal subarachnoid hemorrhage as described below) or neoplastic (although less likely given lack of mass effect) etiologies. Recommend further characterization with contrast-enhanced MRI brain and comparison with prior studies if available.
2. Subarachnoid hemorrhage over the left posterior parietal lobe.