EPIDERMOID CYST OF THE SKULL WITH NONPULSATILE TINNITUS

We report an intradiploic epidermoid cyst of the skull responsible for transverse sinus compression and presenting with nonpulsatile tinnitu s, Plain films and CT both demonstrated the tumour. Cerebral angiograp hy showed best the degree of narrowing of the right transverse sinus, accompanied with turbulent flow probably leading to tinnitus, MRI demo nstrated accurately both the tumour and the dural sinus compression. T he tumour was totally removed, cranioplasty was performed, and the pat ient was discharged free of symptoms.