Background: The discovery of Schwann cells as the oncologic cells led to the recommendation by a consensus meeting in 1992 to use the term vestibular schwannoma. In the literature, the terms acoustic neurinoma, acoustic neuroma, and vestibular schwannoma are used interchangeably. Objective: Evaluation of the outcome of the management of post-operative recurrent or residual vestibular schwannomas by using gamma knife radiosurgery (GKRS). Patients and Methods: In this retrospective descriptive case series study during the year of 2018 on twenty (20) consecutive cases at the International Medical Center (IMC) with residual or recurrent post-operative vestibulocochlear schwannomas (VS) whom underwent gamma knife stereotactic radiosurgery (SRS). Clinical & radiological follow up done for a period of 6 months minimum up to 3 years. Results: After GKRS, it was shown that the cerebellar ataxia improved in 7 cases (100%). 5th cranial nerve affection improved in 6 cases (100%). 7th cranial nerve affection improved in 5 cases (100%). Hearing affection deterioration occurred in 4 cases (20%), 16 cases had stationary course (80%), Local tumor control in 90% of patients & Regrowth of tumor in 10% of patients. Conclusion: GKRS is the best choice in small size VSs less than 3 cm in maximum diameter X, Y, Z either prior surgery was done or not due to its advantageous preservation of all cranial nerves as they can withstand the prescribed SRS dose for VSs.