Objectives: Sinonasal schwannomas account for less than 4% of head and neck schwannomas, with the primary treatment modality being surgical excision via external approaches. The aim of this report is to present a rare case of recurrent schwannoma of the ethmoid cavity involving the anterior skull base which was successfully managed with endoscopic resection. Study Design: Case report and review...

An 18-year-old woman presented with a malignant fibrous histiocytoma (MFH) originating in the orbit and invading the frontal and temporal base of the skull manifesting as exophthalmos and double vision that had persisted for 2 months. Magnetic resonance imaging revealed a tumor in the left orbit that extended as far as the frontal and temporal base of the skull. The tumor was treated by radical...

BACKGROUND Skull base tumors frequently encase or invade adjacent normal neurovascular structures. For this reason, optimal tumor resection with incomplete knowledge of patient anatomy remains a challenge. METHODS To determine the accuracy and utility of image-based preoperative segmentation in skull base tumor resections, we performed a prospective study. Ten patients with skull base tumors ...

We present a case of an anterior skull base tumor invading both cavernous sinuses and extending into the right orbit in a 55 years old female. The radiological aspect was confusing, being highly suggestive for an extensively invasive meningioma. However, the orbital portion of the tumor, which was surgically removed, proved to be an adenoid cystic carcinoma. Some peculiar immunohistochemical fi...

The efficacy of a neurosurgical navigation system using three-dimensional composite computer graphics (CGs) of magnetic resonance (MR) and computed tomography (CT) images was evaluated in skull base surgery. Three-point transformation was used for integration of MR and CT images. MR and CT image data were obtained with three skin markers placed on the patient's scalp. Volume-rendering manipulat...

OBJECTIVE Malignant tumors that involve the skull base pose significant challenges to the clinician because of the proximity of critical neurovascular structures and limited effectiveness of surgical resection without major morbidity. The purpose of this study was to evaluate the efficacy and safety of multi-session radiosurgery in patients with malignancies of the skull base. METHODS Clinica...

Over the last decade, the Endoscopic Endonasal Approach (EEA) has revolutionized skull base neurosurgery. The endonasal approach has anatomical and technical advantages over traditional skull base approaches for the treatment of selected lesions. EEA is not only minimally invasive but also maximally effective for the treatment of a wide variety of skull base lesions. Meticulous knowledge of the...