Delimitation of the risk area of the vertebral artery during the paramedian suboccipital approach.

Objective: The V3 segment of the vertebral artery (V3-VA) is at risk during diverse approaches to the craniovertebral junction. Our objective is to present a system of anatomic and topographic landmarks to identify the V3-VA during the paramedian suboccipital approach (PMSOA) with the help of minimal or basic tools.

Material And Methods: The first was a retrospective analysis of the angiotomography (CTA) of 50 patients over 18-years old, and 9 anatomical dissections.

Intradural extramedullary tumors. Retrospective cohort study assessing prognostic factors for functional outcome in adult patients.

Objective: The purpose of this study is to analyze a series of patients with intradural extramedullary tumors (IDEM) and assess factors that may modify or determine the final long term outcome and management.

Materials And Methods: Single Center, retrospective study of a series of surgical patients with IDEM lesions from our Institution operated between 2010 and 2021. Patients with less than 6 months of follow up were excluded.

[Surgical treatment of spinal dural arteriovenous fistulas: Management and long-term results in a series of patients operated in an Argentinian Center].

Introduction: Spinal dural arteriovenous fistula (SDAVF) is a rare vascular disease, of unknown etiology, frequently underdiagnosed. Treatment can be microsurgical or endovascular.

Methods: Retrospective and monocentric analysis of 12 SDAVF patients treated by microsurgery between 2010 and 2021.

Subarachnoid Hemorrhage From Rupture of an Undiagnosed Posterior Circulation Aneurysm During Sellar Tumor Surgery.

Association between cerebral aneurysms and sellar tumors has been previously reported. Rupture of anterior circulation aneurysms during a transsphenoidal surgery causing massive subarachnoid hemorrhage (SAH) is uncommon, but rupture of a posterior circulation aneurysm is an infrequent event. We present three cases of SAH secondary to rupture of an undetected posterior circulation aneurysm during transsphenoidal surgery to treat a sellar tumor.