Radiosurgery of meningeal melanocytoma

The authors present a case of meningeal melanocytoma arising from Meckel's cave. A coal-black, vascular tumor was partially removed by surgery. Histop athologically, the tumor lacked anaplastic features. Immunohistochemical st udies confirmed that the tumor was of neuroectodermal origin and had low pr oliferating activity. The patient underwent gamma knife radiosurgery for th e residual tumor, in which 25 Gy of radiation was delivered to the tumor ma rgin. Three years after irradiation, the tumor showed marked shrinkage with out complication.