Findings:
No intra- or extra-axial mass lesion or collection is identified. The ventricles and sulcal spaces are within normal limits. The midline structures are normal with no midline shift.
The brain parenchyma is unremarkable. No abnormal signal on the susceptibility-weighted images or diffusion/ADC images is identified.
Compared to the previous study unchanged appearance of the known saccular aneurysm of the right posterolateral type MCA trifurcation, measuring approximately 4 x 6.5 mm.
The Circle of Willis is otherwise normal with conventional anatomy.
Partially empty sella is seen.
The orbits, paranasal sinuses and mastoid air cells are clear.
No bony abnormality is seen. The craniocervical junction is normal.
Conclusion:
Stable appearance of the known right MCA bifurcation aneurysm.