Findings:
No intra- or extra-axial mass lesion or collection is identified. The ventricles and sulcal spaces are within normal limits. There is no midline shift.
Multiple foci of T2 hyperintensity are noted in bilateral cerebral white matter, likely in keeping with mild small vessel ischaemic disease. The brain parenchyma is otherwise unremarkable.
Axial heavily T2 images show mild loss of the bright T2 fluid signal of the lateral semicircular canals on both sides. The vestibular-cochlear apparatus and internal acoustic canals have otherwise a normal appearance.
The facial and vestibulocochlear nerves have a normal appearance, with no focal lesion, signal abnormality or abnormal enhancement. No CPA mass lesion.
There is a vascular loop of the AICA, entering the medial part of the internal auditory canals on both sides (type II).
Previous left sided mastoidectomy with fluid signal within the resection cavity. No diffusion restriction.
The pituitary gland is normal.
The orbits and paranasal sinuses are clear. No bony abnormality is seen.
Conclusion:
Previous left-sided mastoidectomy without evidence of recurrent cholesteatoma.
Mild loss of signal in the lateral semicircular canals on both sides, possibly artifactual. To rule out labyrinthitis ossificans further evaluation with CT petrous temporal bones is advised.