Imaging features of pediatric meningiomas: emphasis on unusual locations.

Purpose: This article aims to analyze pediatric meningioma's imaging characteristics, especially those in unusual locations.

Methods: Pediatric patients with pathologically confirmed meningiomas at our hospital from January 2010 to January 2024 were enrolled. Meningiomas located in the cerebral convexity, parasagittal falcine region, anterior skull base, middle skull base, sphenoid ridge, cerebellopontine angle (CPA), olfactory groove, or juxtasella were considered in usual locations.

High-Grade Ectopic Pituitary Adenoma within the Cerebellopontine Angle: A Case Report.

Ectopic pituitary tumors are neoplasms with no connection to the pituitary gland and are commonly deposited in other areas of the anterior skull base. A 32-year-old woman presented with a 3-month history of right-sided facial weakness, sensorineural hearing loss, diplopia, and severe headaches. Physical examination revealed a mid-dilated sluggishly reactive right pupil with slight limitation in all gazes, as well as right-sided orbicularis weakness, lagophthalmos, and decreased facial sensation.

Diluted intracisternal papaverine for microvascular protection of cranial nerves during vestibular schwannoma and cerebello-pontine angle surgery. Commentary and review of the literature.

Vasospasm after resection of skull base tumors is a rare complication that often produces relevant ischemic sequelae. This review of the literature reports a number of published experiences that can help determine the potential causes of vasospasm after cerebello-pontine angle (CPA) tumor and -in particular-vestibular schwannoma (VS) resection, the ways to prevent it, and the methods to obtain the correct diagnosis. The cause appears to be multifactorial and the surgical approach may contribute to the pathogenesis of vasospasm.

Risk of intracranial meningioma with three potent progestogens: A population-based case-control study.

Background And Purpose: A dose-dependent association between the use of cyproterone acetate (CPA) and intracranial meningioma has been identified but data for other potent progestogens are scarce. The association was assessed between intracranial meningioma surgery and exposure to three potent progestogens: CPA (≥25 mg/day), nomegestrol acetate (NOMAC) (3.75-5 mg/day) and chlormadinone acetate (CMA) (2-10 mg/day).

Hydroxyapatite cement cranioplasty for reconstruction of translabyrinthine approach: aesthetic results, long-term satisfaction, quality of life, and complications.

Background: Translabyrinthine approaches (TLAs) for resection of skull base neoplasms are complex with variable reconstruction techniques. Fat grafts in conjunction with hydroxyapatite bone cement techniques have seldom been described in terms of possible superiority to other skull base reconstruction techniques. We sought to determine the impact of this skull base reconstruction technique on clinical outcomes and patient's satisfaction.

Cochlear implantation after radiosurgery for vestibular schwannoma.

Objective: The object of this study was to ascertain outcomes of cochlear implantation (CI) following stereotactic radiosurgery (SRS) for vestibular schwannoma (VS).

Methods: The authors conducted a retrospective chart review of adult patients with VS treated with SRS who underwent CI between 1990 and 2019 at a single tertiary care referral center. Patient demographics, tumor features, treatment parameters, and pre- and postimplantation audiometric and clinical outcomes are presented.

Skull Base Training and Mentorship.

Objective: To review teaching and mentoring techniques of experienced skull base surgeons and educators STUDY DESIGN:: Expert commentary.

Setting: 8th Quadrennial International Conference on vestibular schwannoma and other CPA tumors, panel on teaching, and mentoring.

Main Outcome Measures: Experiences and opinions of experienced skull base surgeons, both neurosurgeons and neurotologists, presented and discussed at the conference.

NF2-Related Intravestibular Schwannomas: Long-Term Outcomes of Cochlear Implantation.

Objective: Intravestibular schwannomas (IVS) are uncommon tumors in Neurofibromatosis type 2 (NF2) and are mainly associated with multiple internal auditory meatus (IAM) and cerebellopontine angle (CPA) tumors. They usually induce profound hearing loss which can be rehabilitated by cochlear implantation (CI). The aim of this study was to analyze the long-term outcomes of CI during the unpredictable evolution of NF2 disease.

Retrosigmoid Approach for Resection of Large Cystic Vestibular Schwannoma.

 This video was aimed to describe the surgical indications, relevant anatomy, and surgical steps of retrosigmoid approach for resection of a large cystic vestibular schwannoma (VS).  The operative steps are described in a surgical instructional video.  The surgery took place at a tertiary skull base referral center.

Nerve-Sheath-Risen Neuroglial Cyst: Case Report and Review of the Literature.

Background: Neuroglial cysts are rare intracranial lesions that are believed to originate from the sequestration of neural tube lining during embryogenesis. They can present anywhere within the neuraxis; however, their most common location is the frontal lobe. Cerebellopontine angle (CPA) neuroglial cysts are extremely rare and, to the best of our knowledge, there are no previous reports of a neuroglial cyst arising from cranial nerves.

Trigeminal Nerve Schwannoma of the Cerebellopontine Angle.

 Large and even moderate sized, extra-axial cerebellopontine angle (CPA) tumors may fill this restricted space and distort the regional anatomy. It may be difficult to determine even with high resolution magnetic resonance imaging (MRI) if the tumor is dural-based, or what the nerve of origin is if a schwannoma. While clinical history and exam are helpful, they are not unequivocal, particularly since many patients present with a myriad of symptoms, or conversely an incidental finding.

Continuous and Dynamic Facial Nerve Mapping During Surgery of Cerebellopontine Angle Tumors: Clinical Pilot Series.

Objective: To evaluate a new surgical tool combining suction and monopolar neurostimulation (stimulation sucker) for cerebellopontine angle (CPA) tumors. The usefulness for continuous (time) and dynamic (space) facial nerve mapping was studied.

Methods: Patients operated on with the stimulation sucker for a CPA tumor between April 2016 and May 2017 in a tertiary care center were identified.

Postoperative Cochlear Obliteration after Retrosigmoid Approach in Patients with Vestibular Schwannoma.

 Vestibular schwannomas (VSNs) account for the vast majority of lesions located in the cerebellopontine angle (CPA). The goals of VSN surgery are possible total tumor removal, intact facial nerve function, and preservation of cochlear nerve function. In cases of pre- or postoperative deafness, restoration of hearing with auditory brainstem implant (ABI) or cochlear implant (CI) is a promising treatment option with normally better results in CI than in ABI.

Cystic Progression of a Cavernous Malformation at the Level of the Trigeminal Root Entry Zone Presenting With Sudden Onset of Trigeminal Neuralgia.

Background: Cavernous malformations (CM) in the cerebellopontine angle (CPA) are rare, and most of them are solid and extend from the internal auditory canal into the CPA. In contrast, cystic CM arising in the CPA and not involving the internal auditory canal and dura of the skull base are extremely rare. The authors present an uncommon large cystic progression of a cavernous malformation at the level of the trigeminal root entry zone evolving to severe trigeminal neuralgia and brainstem compression.

Lesions Mimicking Small Vestibular Schwannomas.

 Most tumors of the internal auditory canal and cerebellopontine angle (CPA) are vestibular schwannomas (VSs). Preoperative diagnosis is based on typical clinical symptoms and radiological findings. In rare cases, histopathology can, however, show different results.

[A combination use of endoscope and microscope in cerebral pontine angle surgery].

To evaluate the application of combination use of microscope and endoscope in cerebral pontine angle (CPA) surgery. A total of 72 patients undergone lateral skull base surgeries via endoscope under microscopic control from January 2006 to January 2015 was reviewed respectively. The patients including 35 males and 37 females were composed of 22 cases of vestibular swannnomas, 45 cases of cranial neuropathy and 5 cases of CPA chelesteatoma.

Stitchless fibrin glue-aided facial nerve grafting after cerebellopontine angle schwannoma removal: technique and results in 15 cases.

Aim Of The Study: To evaluate the results of facial nerve (FN) grafting using great auricular cable graft and fibrin glue without suturing to palliate FN disruption after removal of large cerebellopontine angle (CPA) vestibular schwannoma (VS) or facial nerve schwannoma (FNS). To assess whether tumor size and origin influenced the results.

Study Design And Setting: Retrospective review of all patients having undergone removal of FNS/VS and needing intraoperative FN repair between 2001 and 2011.

MRI without magnet removal in neurofibromatosis type 2 patients with cochlear and auditory brainstem implants.

Objective: To assess the impact on image quality of MRI without magnet removal in cochlear implant (CI) and auditory brainstem implant (ABI) users with neurofibromatosis type 2 (NF2).

Study Design: Prospective cohort.

Setting: Tertiary center for cochlear and auditory brainstem implantation.

Intracranial clear cell meningioma: a clinicopathologic study of 15 cases.

Object: Clear cell meningioma (CCM) is a rare histological variant of meningioma. CCM has a high recurrence rate and aggressiveness. In this study, we reviewed our experience in the treatment of the lesion.

Intracranial lipomas affecting the cerebellopontine angle and internal auditory canal: a case series.

Objective: To assess the long-term outcome of lipomas affecting the cerebellopontine angle (CPA) and internal auditory canal (IAC).

Patients: This is a retrospective, single-center study of 10 CPA and IAC lipomas that have presented for the last 6 years. There were 8 male and 2 female patients whose age ranged from 22 to 71 years.

Nonvestibular schwannoma tumors in the cerebellopontine angle: a structured approach and management guidelines.

The most common cerebellopontine angle (CPA) tumor is a vestibular schwannoma, but one in five CPA tumors are not vestibular schwannomas. These tumors may require different management strategies. Compared with vestibular schwannomas, symptoms and signs from cranial nerve VIII are less frequent: other cranial nerve and cerebellar symptoms and signs predominate in patients with these less common CPA tumors.

Cochlear schwannomas.

In a series of 179 cerebellopontine angle (CPA) tumors, the authors present nine cases (5%) that were cochlear nerve neuromas. There were six men and three women (mean age, 51 years). Preoperative magnetic resonance imaging confirmed the diagnosis in one case with a labyrinthine extension and raised suspicions in the other four cases, which were confirmed during surgery.

Management Strategy for Meningioma in Pregnancy: A Clinical Study.

We retrospectively studied 18 pregnant women from 600 cases of meningioma treated at this Institution between 1986 and 2001. The variables evaluated included clinical presentation; radiological findings; timing and extent of surgical resection; and an overview of gestational, clinical, and surgical outcomes. Visual impairment was the chief complaint followed by headache and seizures.