Gamma Knife Radiosurgery For Hypoglossal Schwannoma. Report Of Two CasesAkihito Moriki1, Koreaki Mori11Mominoki hospital, Kochi City, Japan Keywords: gamma knife, schwannoma, hypoglossal nerve, outcome, skull base
We present a long-term follow-up study of 2 patients with hypoglossal schwannomas treated by Gamma Knife radiosurgery (GKRS).
Case 1: A 41-year-old female. She complained of dysarthria. Neurological examination revealed tongue deviation to the right and atrophy of the tongue.
Clinically she was diagnosed as right hypoglossal schwannoma and referred to our hospital for GKRS, because she did not want to have surgical resection. On June 23 1994,GKRS was performed with a dose of 15Gy to the tumor margin and an isodose configuration of 50%. The target volume was 1.7ml.
On follow-up MR imaging at 15 years after GKRS, tumor growth have been well controlled without new neurological deficits.
This is a retrospective study.
For over 10 years after treatment, tumor growth has been well controlled in both cases, and there were no complications related to GKRS.
Our experience suggests the usefulness of GKRS for the treatment of hypoglossal schwannoma. Project Roles:
A. Moriki (), K. Mori ()