-We re p o rt two cases of trigeminal neuroma that were operated on by the neuro s u rg e ry team at Felício Rocho Hospital, Belo Horizonte, Minas Gerais State, Brazil. Endoscopic assisted micro s u rg e ry was the technique used to approach the gasserian region tumor with good results.KEY WORDS: trigeminal schwannoma, posterior fossa tumors, endoscopic brain surg e ry, micro n e u ro s u rg e ry.
BACKGROUND:Tuberculum sellae meningiomas is a serious challenge for neurosurgeons. It accounts for up to 10% of all intracranial meningiomas. The difficulty in surgically excising a Tuberculum sellae meningioma comes from its anatomical relationship to the optic nerves and chiasm and to the anterior cerebral and internal carotid arteries and their perforators. The authors discuss the main approaches and the complications based on their experience in comparison to previously reported data. METHODS: We report our personal case series of 38 patients with Tuberculum sellae meningiomas; 36 patients under went craniotomy for tumor resection (12 bifrontal, 12 pterional, 6 supraciliary, 4 unilateral frontals, and 2fronto-orbito-zygomatic); in two patients, the excision was performed through an endoscopic endonasal approach. The Simpson grade of meningioma resection as well as the non-visual morbidity and the mortality rates were analyzed. RESULTS: Thirty-one patients had Simpson grades 1 and 2 excisions, while seven had Simpson grade 4 excisions. The overall rate of non-visual morbidity was 13.15% (5 of 38 patients) and mortality was 5.3% (2 of 38). CONCLUSION: The primary symptom leading to the diagnosis of a Tuberculum sellae meningioma is visual compromise and the main goal of surgery is to achieve improvement of vision. Favorable outcomes were achieved with appropriate selection of surgical approach. More studies are necessary to define the prognostic factors for patients in this scenario.
Background:Dissecting giant pseudoaneurysm of the middle cerebral artery (MCA) is a rare lesion often presenting challenges to neurosurgical teams dealing with this specific pathology. Giant pseudoaneurysm originating from a dissecting distal segment of the MCA treated with aneurysm trapping under motor and sensitive evoked potential monitoring with a successful outcome is presented in the article followed by a brief discussion on the subject.Case Description:A case of a previously healthy young female patient admitted at the emergency room of Santa Paula Hospital with a history of a sudden headache and syncope, dysphasia, and Grade 4 right hemiparesis due to a large brain hemorrhage secondary to a 25 mm ruptured pseudoaneurysm originated from a distal left MCA dissecting segment is described. Because the patient risked neurological worsening, aneurysm was treated with parent and efferent vessel trapping technique and no changes on the sensitive and motor evoked potential (MEP) from baseline informed on this decision. Hemorrhage was completely drained after aneurysm was secured.Conclusion:Neurophysiological sensitive and MEP monitoring, on this specific case was a valuable tool and informed on the decision of trapping of this large vascular lesion.
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