2,161 results match your criteria Imaging in Cranial Nerve Schwannoma

Hypoglossal schwannoma in the submandibular region.

BMJ Case Rep 2021 May 26;14(5). Epub 2021 May 26.

ENT, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.

Hypoglossal nerve schwannomas originating extracranially and mimicking a submandibular salivary gland tumour are extremely rare. A 55-year-old woman presented with a painless, gradually increasing swelling in the right submandibular region for the past 1 year. Fine-needle aspiration cytology and contrast-enhanced CT of the swelling showed features of submandibular gland malignant lesion. Read More

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Endoscopic Endonasal Surgery of a Large Vidian Nerve Schwannoma With Preparation for Avoiding Major Vascular Injury.

Cureus 2021 Mar 31;13(3):e14230. Epub 2021 Mar 31.

Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, JPN.

Vidian nerve schwannomas are extremely rare, and their surgical management requires an awareness of the surrounding vascular and nervous systems, including the internal carotid artery. Herein, we report a case of a vidian nerve schwannoma that was successfully removed using an endoscopic endonasal approach in a 21-year-old patient who presented with lacrimal hyposecretion. Imaging revealed a large mass extending to the middle cranial fossa posteriorly, to the pterygopalatine fossa laterally, and to the sphenoid sinus medially. Read More

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Petrosal Approach With Preservation of the Superior Petrosal Sinus (the Graceful Petrosal) for Resection of Giant Trigeminal Schwannoma: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 Apr;20(5):E342-E343

Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.

Trigeminal schwannomas are benign tumors amendable to curative surgical resection.1 Excellent outcomes, with preservation and improvement of cranial nerve function, including trigeminal nerve function, have been reported with microsurgical resection through skull base approaches.2 Dumbell shaped tumors, involving the middle and posterior fossa, are more challenging. Read More

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Surgical management of intraoperatively diagnosed facial nerve schwannoma located at internal auditory canal and cerebellopontine angle - our experiences of 14 cases.

Acta Otolaryngol 2021 Jun 7;141(6):594-598. Epub 2021 Apr 7.

Department of Otology and Skull Base Surgery, Eye & ENT Hospital, Fudan University, Shanghai, PR China.

Background: Facial nerve schwannomas located at internal auditory canal and cerebellopontine angle (IAC/CPA FNS) were diagnosed intraoperatively, it poses a therapeutic dilemma to the surgeon.

Objective: To report our experience in managing IAC/CPA FNS and to propose a treatment strategy.

Methods: A total of 14 patients with IAC/CPA FNS who were diagnosed intraoperatively and treated by operation between 2015 and 2019 were retrospectively studied. Read More

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Can an Imaging Marker of Consistency Predict Intraoperative Experience and Clinical Outcomes for Vestibular Schwannomas? A Retrospective Review.

J Neurol Surg B Skull Base 2021 Apr 24;82(2):251-257. Epub 2019 Sep 24.

Department of Otolaryngology - Head & Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States.

 The main purpose of this article is to determine if vestibular schwannoma consistency as determined by tissue intensity on T2-weighted magnetic resonance imagings (MRIs) is predictive of intraoperative experience and postoperative clinical outcomes.  Retrospective chart review.  Tertiary referral center. Read More

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Transtemporal Suprajugular Approach with Neck Dissection for Jugular Foramen Tumor Resection: Operative Video.

J Neurol Surg B Skull Base 2021 Feb 13;82(Suppl 1):S55-S56. Epub 2020 Mar 13.

Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States.

This video demonstrates the transmastoid suprajugular approach with neck dissection to a solitary fibrous tumor involving the jugular foramen and upper cervical region. This patient was a 39-year-old man who presented with dysphagia and cranial nerve (CN) XI and CN XII palsies. Imaging revealed a large homogenously enhancing lesion involving the jugular foramen and extending into the retropharyngeal space ( Fig. Read More

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February 2021

Unilateral Facial Paralysis in the Pediatric Patient.

Cureus 2021 Jan 14;13(1):e12701. Epub 2021 Jan 14.

Otolaryngology, Emory University School of Medicine, Atlanta, USA.

Unilateral facial paralysis (FP) in the pediatric population is a rare entity secondary to multiple etiologies including infectious, vascular, and neoplastic. In persistent or recurrent FP, imaging can demonstrate a peripheral facial nerve (FN) lesion. Given the rarity of FN lesions, however, there is limited literature regarding optimal management. Read More

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January 2021

Multi-compartment skull base orbital cavernous venous malformation: A rare presentation of a common orbital mass.

Am J Ophthalmol Case Rep 2021 Mar 21;21:101020. Epub 2021 Jan 21.

Department of Ophthalmology, Byers Eye Institute, Stanford University, Palo Alto, CA, USA.

Purpose: We present a unique case of an orbital intraconal cavernous venous malformation that extended along the trigeminal nerve to the pterygopalatine and middle cranial fossa. Our aim is to describe an atypical presentation of this common orbital vascular mass.

Observations: A 57-year-old female presented with right eye proptosis. Read More

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Vibration-induced nystagmus and head impulse test screening for vestibular schwannoma.

Acta Otolaryngol 2021 Apr 15;141(4):340-347. Epub 2021 Feb 15.

Otoneurology Unit, ENT Department, University Hospital of Salamanca, IBSAL, Salamanca, Spain.

Level Of Evidence: II-2.

Background: Vestibular schwannomas are benign tumors of the eight cranial nerve that may cause asymmetric sensorineural hearing loss (ASHL) and vestibular dysfunction.

Objective: The aim of this study was to assess the role of the video head impulse test (vHIT) and vibration-induced nystagmus (VIN) test in diagnosing vestibular schwannoma in a population of patients with Asymmetric sensorineural hearing loss. Read More

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Three-dimensional (3D) Printed Vestibular Schwannoma for Facial Nerve Tractography Validation.

Otol Neurotol 2021 06;42(5):e598-e604

Eaton-Peabody Laboratories, Massachusetts Eye and Ear.

Objectives: Predicting the course of cranial nerve (CN) VII in the cerebellopontine angle (CPA) on preoperative imaging for vestibular schwannoma (VS) may help guide surgical resection and reduce complications. Diffusion MRI based tractography has been used to identify cranial nerve trajectory, but intraoperative validation of this novel approach is challenging. Currently, validation is based on operative report descriptions of the course of cranial nerves, but yields a simplified picture of the three-dimensional (3D) course of CN VII. Read More

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Trans-canal Endoscopic Repair of Cerebrospinal Fluid (CSF) Leak Following Vestibular Schwannoma Resection.

Otol Neurotol 2020 12;41(10):e1282

Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University, Nashville, Tennessee.

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December 2020

Outcomes after stereotactic radiosurgery for schwannomas of the oculomotor, trochlear, and abducens nerves.

J Neurosurg 2021 Jan 22:1-7. Epub 2021 Jan 22.

1Division of Neurosurgery, Department of Surgery, Université de Sherbrooke, Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Québec, Canada.

Objective: Cranial nerve (CN) schwannomas are intracranial tumors that are commonly managed by stereotactic radiosurgery (SRS). There is a large body of literature supporting the use of SRS for vestibular schwannomas. Schwannomas of the oculomotor nerves (CNs III, IV, and VI) are rare skull base tumors, occurring close to the brainstem and often involving the cavernous sinus. Read More

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January 2021

Cystic Dumbbell-Shaped C1 Schwannoma with Intracranial Extension and Hydrocephalus.

World Neurosurg 2021 Apr 11;148:24-28. Epub 2021 Jan 11.

Department of Neurosurgery, School of Medicine, Keio University, Tokyo, Japan.

Background: Schwannomas at the craniocervical junction commonly originate from the lower cranial nerves or C1 and C2 nerves. To date, very few cases of C1 schwannomas have been described in the literature, and the majority involve either the intra- or the extradural compartment, but not both. To our knowledge, this report documents the first case of a dumbbell-shaped C1 schwannoma that encompassed both intra- and extradural compartments and was accompanied by hydrocephalus. Read More

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Anterior Petrosal Approach for Enlarging Previously Radiated Recurrent Trigeminal Schwannoma: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 Apr;20(5):E353

Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota.

Trigeminal nerve schwannomas (TNSs) are rare lesions that typically present with symptoms of trigeminal neuropathy or other cranial nerve palsies. These lesions classically have a dumbbell shape, with an anterior component within Meckel's cave and posterior component extending into the posterior fossa through the porus trigeminus. Surgical resection of TNSs can often be achieved via an extradural subtemporal approach to Meckel's cave without an anterior petrousectomy, even for tumors with a significant posterior fossa component, as the tumor often erodes a portion of the petrous apex. Read More

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Extratemporal intraparotid facial nerve schwannoma.

BMJ Case Rep 2021 Jan 11;14(1). Epub 2021 Jan 11.

ENT, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.

Schwannomas of the eighth nerve are common, usually found in syndromic association with neurofibromatosis-2. The occurrence of seventh nerve schwannoma, especially in its extratemporal course, is very rare. Here, we present a case report of an extratemporal facial nerve schwannoma diagnosed preoperatively with cytopathology and postoperative histopathologic confirmation. Read More

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January 2021

Carotid Body Tumor - radiological imaging and genetic assessment.

Pol Przegl Chir 2020 Nov;92(6):39-44

Medical Center Diagnostyka, Bialystok, Poland.

Carotid Body Tumor i.e. Paraganglioma is a challenging entity from the point of multidisciplinary diagnosis. Read More

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November 2020

Evaluation of schwannoma using the 3D-SPACE sequence: comparison with the 3D-CISS sequence in 3T-MRI.

Turk J Med Sci 2021 Jan 2. Epub 2021 Jan 2.

Purpose: The purpose of this study is to compare the diagnostic accuracy and interobserver reliability of the T2-weighted 3D-SPACE (three-dimensional sampling perfection with application-optimized contrasts by using different flip angle evolutions) sequence in comparison with T2-weighted 3D-CISS (three-dimensional constructive interference in steady-state) sequences for diagnosis of schwannomas.

Methods And Materials: Forty patients with CPA, IAC, and cochlear schwannoma who had undergone magnetic resonance imaging (MRI) using the 3D-CISS and 3D-SPACE sequences were identified. The sequences were retrospectively evaluated by two radiologists for the qualitative analyses, which was subsequently compared using the Mann?Whitney U test. Read More

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January 2021

Abducens nerve schwannoma of the cavernous sinus: A case report and literature review.

Surg Neurol Int 2020 25;11:402. Epub 2020 Nov 25.

Department of Neuroscience, Division of Neurological Surgery, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.

Background: Schwannomas of the abducens nerve are a rare pathology and are encountered less within the cavernous sinus. We describe a case of sixth cranial nerve schwannoma, in the cavernous sinus.

Case Description: A 50-year-old lady, presented with 2 years history of double vision and left facial numbness that started 6 months before presentation, found to have hyperintense lobulated mass at the left cavernous sinus extending into Meckel's cave with bony remodeling on magnetic resonance imaging. Read More

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November 2020

Diagnosis and outcomes of surgical treatment of carotid bifurcation tumors.

J Int Med Res 2020 Dec;48(12):300060520976495

Department of Vascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.

Objective: To retrospectively review our experience with the diagnosis and treatment of carotid bifurcation tumors (CBFT).

Methods: This was a retrospective study of 60 patients with CBFT who underwent surgical and conservative treatment. The patients' clinicopathological features, imaging examination findings, treatment strategy, and prognosis were analyzed. Read More

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December 2020

Partial laryngectomy and reconstruction with rotation of the epiglottis in the treatment of a rare laryngeal schwannoma: a case report.

J Med Case Rep 2020 Nov 25;14(1):229. Epub 2020 Nov 25.

Department of Otorhinolaryngology and Head and Neck Surgery, CRER - Centro de Reabilitação e Readaptação Dr. Henrique Santillo, Goiânia, Goiás, Av. Ver. José Monteiro, 1655 - Negrão de Lima, Goiânia, 74653-230, Brazil.

Background: Neurogenic tumors of the larynx are rare, with few cases having been reported in the literature. Schwannomas are responsible for 0.1% of all benign tumors of the larynx. Read More

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November 2020

Anterior skull base olfactory tumours, which is what? A case report and review.

J Clin Neurosci 2020 Nov 25;81:1-5. Epub 2020 Sep 25.

Neurosurgery Department, Royal Darwin Hospital, Darwin, Northern Territory, Australia; Kenneth G Jamieson Department of Neurosurgery, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia. Electronic address:

Intracranial schwannomas not originating from cranial nerves are rare. In this paper, we report a case of a 50-year-old male who presented with worsening headaches, diplopia and nausea over two years. Radiological imaging revealed a large tumour arising from the olfactory groove region with a preoperative diagnosis of olfactory groove meningioma (OGM). Read More

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November 2020

Prognostic Factors for the Outcome of Translabyrinthine Surgery for Vestibular Schwannomas.

Otol Neurotol 2021 03;42(3):475-482

Department of Otorhinolaryngology/Head and Neck Surgery.

Objective: To identify predictors of tumor recurrence and postoperative facial nerve function after translabyrinthine surgery for unilateral vestibular schwannomas.

Study Design: Retrospective study.

Setting: Tertiary referral center. Read More

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Endoscope-Assisted Retromastoid Intradural Suprameatal Approach for Trigeminal Schwannoma.

Neurol India 2020 Sep-Oct;68(5):1016-1018

Department of Neurosurgery, Rutgers-Robert Wood Johnson University Hospital, New Brunswick, New Jersey, USA.

Background And Introduction: Dumbbell trigeminal schwannoma is the second most common type of intracranial schwannomas.

Objective: Herein, we are describing and presenting a video of left trigeminal dumbbell schwannoma with a predominant posterior fossa component (modified Samii's grade C1), operated through left Retromastoid Intradural Suprameatal Approach (RISA). We demonstrate a step by step technique of a previously defined procedure for educational purpose. Read More

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Tracking Spontaneous Vestibular Schwannoma Regression with Volumetric Measurements.

Laryngoscope 2021 05 26;131(5):E1647-E1652. Epub 2020 Oct 26.

Department of Otolaryngology-Head and Neck Surgery, NYU Langone Health, New York, New York, U.S.A.

Objective: To characterize a series of patients with MRI evidence of spontaneous vestibular schwannoma (VS) regression.

Study Design: Retrospective case series.

Methods: Retrospective review between 2012 and 2020 from a single, tertiary-care center of all patients with an untreated, sporadic VS and spontaneous regression in volumetric tumor size over the course of observation. Read More

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Cranial nerve schwannoma - A pictorial essay.

Indian J Radiol Imaging 2020 Apr-Jun;30(2):116-125. Epub 2020 Jul 13.

Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India.

Schwannomas are peripheral nerve sheath tumours arising from cranial, spinal or peripheral nerves. Most of the schwannomas are benign with the rare possibility of malignant transformation. Cranial nerve schwannomas can be seen along the course of any cranial nerve in the intracranial region or head and neck location. Read More

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Meningothelial meningioma of the oculomotor nerve: A case report and review of the literature.

Surg Neurol Int 2020 2;11:314. Epub 2020 Oct 2.

Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Background: The origin of meningioma tumors is known as the meningothelial or arachnoid cap cells. The arachnoid granulations or villi are concentrated along with the dural venous sinuses in the cerebral convexity, parasagittally, and sphenoid wing regions. The majority of meningiomas are found in these locations with dural attachment. Read More

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October 2020

Unusual Sites for Extracranial Head-Neck Schwannomas.

Indian J Otolaryngol Head Neck Surg 2020 Dec 20;72(4):416-421. Epub 2020 Feb 20.

Departments of Otorhinolaryngology and Head Neck Surgery, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029 India.

Schwannomas are a frequent cause of swellings in the head and neck region. Due to the abundance of peripheral, cranial and autonomic nerves in this region, schwannomas can present in variety of locations, posing a diagnostic and therapeutic challenge to the surgeon. Unusual sites in head and neck region can have varied presentation depending on the site of origin. Read More

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December 2020

[A Case of Trochlear Nerve Neurinoma Presenting with Pathological Laughter].

No Shinkei Geka 2020 Oct;48(10):909-913

Department of Neurosurgery, Asahi University Hospital.

Trochlear nerve neurinomas are rare and solitary tumors without neurofibromatosis are extremely rare. We report a case of trochlear nerve neurinoma presenting with pathological laughter and diplopia. A 40-year-old male patient presented with diplopia and pathological laughter 2 months before admission. Read More

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October 2020

The Association of Vestibular Schwannoma Volume With Facial Nerve Outcomes After Surgical Resection.

Laryngoscope 2021 04 2;131(4):E1328-E1334. Epub 2020 Oct 2.

Department of Otolaryngology - Head and Neck Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, U.S.A.

Objective: To explore the relationship between tumor size and facial nerve outcomes following vestibular schwannoma (VS) resection.

Study Design: Single institutional retrospective chart review of all adult patients with untreated sporadic VS who underwent surgical resection from 2008 to 2018 with preoperative magnetic resonance imaging (MRI) and 1 year of follow-up. The primary outcome measure was facial nerve outcome as assessed by the House-Brackmann facial nerve grading system. Read More

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Aberrant AICA Injury During Translabyrinthine Approach.

Otol Neurotol 2020 12;41(10):1423-1426

Department of Otolaryngology - Head and Neck Surgery, University of Michigan, Ann Arbor, Michigan.

Objective: To define a complication of the translabyrinthine surgical approach to the posterior fossa related to a rare variant of the anterior inferior cerebellar artery (AICA) that penetrated into the petrous temporal bone.

Patient: A healthy 59-year-old male with a unilateral sporadic vestibular schwannoma.

Intervention: The patient elected to undergo a translabyrinthine approach for resection of a vestibular schwannoma. Read More

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December 2020