No definite abnormality is seen in the visualized portion of the brain parenchyma. The visualized paranasal sinuses are clear. IMPRESSION: Focal apparent enlargement of the mastoid portion of the descending facial nerve canals bilaterally, with the right slightly larger than the left. When reviewed with axial reconstructions parallel to the hard palate, this apparent abnormality reduces but still remains, but is of dubious significance. END OF IMPRESSION: 70480