This report, with an accompanying videotape, details the authors' technique for performing radical resections of tumors intrinsic to the insular lobe. The resection technique takes advantage of the fact that many intrinsic insular tumors grow within the confines of the insula, usually without violating pial borders or invading the medial structures. The method described is based on an anatomic dissection of the insula that uses the internal boundaries of the region, particularly the peri-insular sulci, as guides for resection. The videotape provides a visual description of this method.