Female, 23 years old, history of acoustic neuroma status post resection two years ago. Follow-up exam. Deformity of the right squamous and mastoid temporal bone is seen compatible with prior surgical access for resection of a right IAC tumor. On the present study, enhancement is seen within the right IAC measuring 9 mm in length by 5 mm in thickness. This enhancement has increased from the prior examination of 2012 where only minimal if any was present. No extracanalicular extension is seen.The remainder of the brain demonstrates normal signal intensity and morphology. No evidence of pathologic parenchymal or extra enhancement is seen. No significant intracranial hemorrhage or abnormal extra-axial fluid is detected. The ventricular system is normal in size and morphology.
Sequelae of right IAC tumor resection are seen. Since the prior examination from 2012, enhancement within the right IAC has increased. This finding could represent either postoperative granulation or residual/recurrent tumor.