Preoperative Quality of Life in Patients with Small Vestibular Schwannomas.

Background: Vestibular schwannomas (VS) are benign tumors arising from the eighth cranial nerve. They often cause no symptoms for a long period of time. Due to the improved availability and quality of magnetic resonance imaging diagnostics, even small tumors can be diagnosed at an early stage.

Isolated cisternal third cranial nerve schwannoma: an insight into a clinico-radiological features.

A young adult female in her 20s presented with gradually progressive exodeviation of the left eyeball from the last 3 years. She had mild ptosis and proptosis in her left eye with 3 mm of anisocoria. On examination, she was found to have 60 prism dioptres exotropia with minimal motility limitation (-1 adduction, elevation and depression) in the left eye.

Endoscopic strategies for giant V2 schwannoma: A step-by-step guide to the combined endonasal and pre lacrimal approaches.

This video article aims to describe the surgical technique and effectiveness of a combined endoscopic transnasal and pre-lacrimal recess approach for paramedian V2 schwannoma.

Avoidance and Management of Complications in Retrosigmoid Approach to Vestibular Schwannomas.

An experience with two rare complications during surgery of vestibular schwannomas (VSs) is presented, and measures to avoid and manage the complications are discussed.Case A: Spinal cord ischemia in semi-sitting position: A 47-year-old with a giant vestibular schwannoma (VS) underwent surgery through a retrosigmoid approach in the semi-sitting position. The intraoperative phase was uneventful, except for an episode of moderate hypotension.

Middle ear cholesteatoma and facial nerve hypertrophy mimicking schwannoma in Charcot-Marie-Tooth disease: A case report.

Rationale: Charcot-Marie-Tooth (CMT) disease, a hereditary motor and sensory neuropathy, presents with progressive chronic sensory and distal motor polyneuropathy. While sensorineural hearing loss and vestibular impairment have been documented in CMT patients, concurrent middle ear cholesteatoma and persistent direction-changing positional nystagmus have not.

Patient Concerns: This study details a 22-year-old man with CMT1 exhibiting these symptoms.

Quantitative Assessment of Collagen Architecture to Determine Role of Tumor Stroma During Vestibular Schwannoma Progression.

Objective: The primary objective was to characterize the abundance and architecture of collagen in the extracellular matrix in vestibular schwannoma (VS). The secondary objective was to investigate the association between collagen architecture and tumor size.

Study Design: Retrospective cohort study.

Detecting endolymphatic hydrops in patients with cranial nerve VIII schwannoma using hydrops MR examination.

Purpose: This study utilized Hydrops MRI in patients with cranial nerve (CN) VIII schwannoma to assess the concomitance with endolymphatic hydrops (EH), aiming to elucidate the mechanism of hydrops formation in these patients.

Methods: Twenty-six patients diagnosed as CN VIII schwannoma including vestibular schwannoma (VS) in 24 and intracochlear schwannoma (ICS) in 2 were enrolled. Fifteen patients received radiosurgery and 11 patients opted for a wait-and-scan approach.

Navigating the Labyrinth: Chylothorax and Chylous Ascites Unveiled After Abdominal Surgery for an Exceptionally Rare Tumor.

Schwannomas, originating from the Schwann sheath of peripheral or cranial nerves, are rare tumors commonly found in the head and neck or extremities. Adrenal schwannomas, however, are exceedingly rare, accounting for less than 1% of all adrenal tumors. Here, we present a case of a 31-year-old Caucasian woman diagnosed with an adrenal schwannoma, which was incidentally discovered during imaging studies for an unrelated issue.

Stereotactic radio-neurosurgery for jugular foramen schwannomas.

Background: Stereotactic radiosurgery (SRS) represents a minimally invasive and valuable alternative for jugular foramen schwannomas (JFS), both as upfront and/or adjuvant treatment (in hybrid approaches).

Methods: We conducted a retrospective review of our cases treated at the Lausanne University Hospital (CHUV) from June 2010 to October 2023. Eleven patients underwent SRS, among whom three had prior surgery, two in our center in the frame of a planned combined approach and one in another center.

Use of Ultra-Short Echo Time MRI to Improve Temporal Bone Imaging.

Objective: The short T2 nature of cortical bone causes it to appear similar to air on MR, forcing clinicians to rely on computed tomography imaging, with its attendant ionizing radiation exposure, to define temporal bone structures. Through the use of novel MR sequences with ultra-short echo times (UTE), short T2 structures are now able to be visualized, allowing for improved understanding of anatomical relationships.

Methods: Eight patients (50% female) undergoing MR imaging of the skull base for diagnostic purposes (62.

Microsurgical Resection of Trigeminal Schwannoma Through Transorbital Approach: 2-Dimensional Operative Video.

We present the case of an asymptomatic 34-year-old woman who was found to have an incidental left trigeminal schwannoma.1,2 Owing to the rapid increase in size on imaging, an atypical finding for this type of lesion,3 as well as the risk of cranial nerve involvement and need for tissue diagnosis, the patient underwent a microsurgical left transorbital approach with lateral orbitotomy to resect the lesion.4,5 Piecemeal resection was performed, and the internal contents of the cavernous sinus were preserved.

Asymptomatic Purely Intracranial Vagal Schwannoma: Clinical Case Report and Literature Review.

Vagus nerve schwannoma is an infrequently occurring schwannoma, in which a distinct subtype exists wherein the tumor is confined to the cerebellomedullary cistern without invading the jugular foramen. This unique tumor is called purely intracranial vagal schwannoma. In this case report, we present a case of purely intracranial vagal schwannoma in its asymptomatic early phase, incidentally discovered during surgery performed on a patient with hemifacial spasm.

Accessory Nerve Schwannoma with Medulla Oblongata Compression: Microsurgical Resection by Far Lateral Suboccipital Transcondylar Approach: 2-Dimensional Operative Video.

Schwannomas overall account for approximately 8% of primary brain tumors, with the majority of them arising from the vestibular nerves. Non-vestibular schwannomas are considered rare, particularly ones arising from the accessory nerve, constituting only around 4% of craniovertebral junction schwannomas. The far lateral approach and its variations is an important tool in the armamentarium of skull base neurosurgeons.

Image features and clinical analysis of retroperitoneal pelvic schwannoma: a case report.

Background: Schwannomas are benign usually encapsulated nerve sheath tumors derived from the Schwann cells, and affecting single or multiple nerves. The tumors commonly arise from the cranial nerves as acoustic neurinomas but they are extremely rare in the pelvis and the retroperitoneal area. Retroperitoneal pelvic schwannomas often present with non-specific symptoms leading to misdiagnosis and prolonged morbidity.

Endoscopic Transpterygoid Approach to Meckel's Cave: Technical Considerations and Retrospective Analysis of a Clinical Series.

Objective: Tumors located within the Meckel's cave (MC) pose a significant surgical challenge. Although several corridors to access this complex region have been described, the endoscopic transpterygoid approach (ETPA) and the endoscopic transorbital superior eyelid approach (ETOA) have emerged in recent years, as viable alternatives to traditional microsurgical transcranial approaches (MTA). To date, there is a limited literature on surgical series considering endoscopic-assisted approaches to the MC.

Single-Center Experience in Microsurgical Resection of Acoustic Neurinomas and the Benefit of Microscope-Based Augmented Reality.

: Microsurgical resection with intraoperative neuromonitoring is the gold standard for acoustic neurinomas (ANs) which are classified as T3 or T4 tumors according to the Hannover Classification. Microscope-based augmented reality (AR) can be beneficial in cerebellopontine angle and lateral skull base surgery, since these are small areas packed with anatomical structures and the use of this technology enables automatic 3D building of a model without the need for a surgeon to mentally perform this task of transferring 2D images seen on the microscope into imaginary 3D images, which then reduces the possibility of error and provides better orientation in the operative field. : All patients who underwent surgery for resection of ANs in our department were included in this study.

Comparative Analysis on Vestibular Schwannoma Surgery with and without Intraoperative Fluorescein Sodium Enhancement.

Background: Vestibular schwannoma (VS), also known as acoustic neuroma, is a benign, well-encapsulated, and slow-growing tumor that originates from Schwann cells, which form the myelin sheath around the vestibulocochlear nerve (VIII cranial nerve). The surgical treatment of this condition presents a challenging task for surgeons, as the tumor's location and size make it difficult to remove without causing damage to the surrounding structures. In recent years, fluorescein sodium (FS) has been proposed as a tool to enhance surgical outcomes in VS surgery.

Tumor biomechanical stiffness by magnetic resonance elastography predicts surgical outcomes and identifies biomarkers in vestibular schwannoma and meningioma.

Variations in the biomechanical stiffness of brain tumors can not only influence the difficulty of surgical resection but also impact postoperative outcomes. In a prospective, single-blinded study, we utilize pre-operative magnetic resonance elastography (MRE) to predict the stiffness of intracranial tumors intraoperatively and assess the impact of increased tumor stiffness on clinical outcomes following microsurgical resection of vestibular schwannomas (VS) and meningiomas. MRE measurements significantly correlated with intraoperative tumor stiffness and baseline hearing status of VS patients.

[Accessory nerve meningioma. A case report and literature review].

Meningiomas arising from accessory nerve sheath without dural attachment are rare. To date, only 5 cases are described in the literature. A 53-year-old male presented with long history of occipital pain and headaches.

Pediatric schwannoma of the hypoglossal nerve: a case report and narrative literature overview.

Schwannomas are benign, slow-growing tumors originating from the Schwann cells of nerve sheaths. Extracranial schwannomas are rare, particularly in pediatric populations. Here, we report the case of a hypoglossal schwannoma in a 15-year-old male who experienced tongue paresthesia and fasciculations and difficulty swallowing two years before hospital admission.

Preoperative diffusion tensor imaging: Fiber-trajectory-distribution-based tractography to identify facial nerve in vestibular schwannoma.

Purpose: Tractography of the facial nerve based on diffusion MRI is instrumental before surgery for the resection of vestibular schwannoma, but no excellent methods usable for the suppression of motion and image noise have been proposed. The aim of this study was to effectively suppress noise and provide accurate facial nerve reconstruction by extend a fiber trajectory distribution function based on the fourth-order streamline differential equations.

Methods: Preoperative MRI from 33 patients with vestibular schwannoma who underwent surgical resection were utilized in this study.