Microsurgical total removal of olfactory groove meningiomas and reconstruction of the invaded skull bases.

In order to study the microsurgical techniques of olfactory groove meningiomas invading the skull base and the reconstruction of the skull base, clinical materials of 17 patients with olfactory groove meningiomas were analyzed retrospectively. Simpson Grade I resection was achieved in all cases. No death, cerebrospinal fluid rhinorrhea, or intracranial infection occurred postoperatively, and no tumor recurrence was observed after a 1-to 9-year follow-up. For olfactory groove meningiomas invading the skull bases, microsurgical total removal of the lesions as well as the complete reconstruction of the skull bases is essential in order to achieve total tumor resection and impede tumor recurrence without serious complication.