Endoscopic Extended Transsphenoidal Surgery for Transbasal Tuberculum Sellae Meningioma: 2-Dimensional Operative Video.

Transbasal meningiomas1 are a rare group of tumors that grow intracranially, invade the skull base, and propagate extracranially; they are usually located at the level of the olfactory cribra and sphenoid wing.1-4 Transbasal tuberculum sellae meningiomas are a subset of these tumors, which extend into the suprasellar and sphenoid regions. The traditional transcranial approach for some transbasal meningiomas has recently evolved toward the transnasal endoscopic approach, which allows the removal of both the intranasal and intracranial components, reducing the manipulation of the optic nerves and neurovascular structures. Nevertheless, specific anatomical criteria must be present; the knowledge of specific anatomy5,6 and the surgeon's experience are fundamental for reaching the most favorable outcome.7-11 In this video, we present the case of a 50-year-old woman with a history of progressive visual impairment and scotoma in the left inferotemporal quadrant. Radiological examinations suggested a transbasal tuberculum meningioma that extended into the suprasellar region, sphenoid sinus, and optic canals. An endoscopic transtuberculum approach with intraoperative visual-evoked potentials12 was performed, allowing an early devascularization with the preservation of the superior hypophyseal arteries and the removal of the component extending in the medial portion of both optic canals. The postoperative MRI documented a gross total resection without complications. The patient reported an immediate improvement of the visual symptoms. Histopathology documented a meningioma (CNS World Health Organization grade 1) with bone invasion. The patient consented to the procedure and to the publication of her image; Institutional Review Board approval was not required for this single case report.