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Cerebellopontine angle

Jan-Folkard Willms, Gerasimos Baltsavias, Jan-Karl Burkhardt, Silvia Ernst, Alexander A Tarnutzer
We discuss a case with combined vestibulocochlear and facial neuropathy mimicking a less urgent peripheral vestibular pattern of acute vestibular syndrome (AVS). With initial magnetic resonance imaging read as normal, the patient was treated for vestibular neuropathy until headaches worsened and a diagnosis of subarachnoid hemorrhage was made. On conventional angiography, a ruptured distal right-sided aneurysm of the anterior inferior cerebellar artery was diagnosed and coiled. Whereas acute vestibular loss usually points to a benign peripheral cause of AVS, combined neuropathy of the vestibulocochlear and the facial nerve requires immediate neuroimaging focusing on the cerebellopontine angle...
October 13, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
Stefan Rampp, Leonhard Rensch, Sebastian Simmermacher, Torsten Rahne, Christian Strauss, Julian Prell
OBJECTIVE Brainstem auditory evoked potentials (BAEPs) have been used for intraoperative monitoring of the auditory nerve for many years. However, BAEPs yield limited information about the expected postoperative hearing quality and speech perception. The auditory steady-state response (ASSR) enables objective audiograms to be obtained in patients under anesthesia. These ASSRs could be used for intraoperative estimation of hearing classes to improve the postoperative outcome and quality of life. Studies investigating the clinical use of ASSRs during total intravenous anesthesia are currently lacking...
October 14, 2016: Journal of Neurosurgery
Carlito Lagman, Winward Choy, Seung J Lee, Lawrance K Chung, Timothy T Bui, Isaac Yang, Howard W Goldman
This case report illustrates the potential fallacy of attributing a patient's symptoms to an incidental finding. Serial imaging of small, asymptomatic cerebellopontine angle (CPA) lipomas is favored. It is imperative to accurately diagnose CPA lipoma on imaging and differentiate it from more common CPA lesions. We herein present a patient with symptoms consistent with Bell's palsy and an incidental finding of a CPA lipoma. Additionally, we performed a review of the literature for case reports of patients presenting with facial symptoms and diagnosed with a CPA lipoma...
August 24, 2016: Curēus
Kajetan L von Eckardstein, Dorothee Mielke, Reza Akhavan-Sigari, Veit Rohde
Background and Study Aims In microvascular decompression of the trigeminal nerve for trigeminal neuralgia (TN), the site of conflict is occasionally difficult to identify. Endoscopy has been described to better evaluate the anatomical conflict in such situations. We hypothesized that indocyanine green (ICG) angiography could allow for better visualization of the compressing artery and its anatomical relation to the nerve. Material and Methods ICG angiography was performed in 17 TN patients undergoing microvascular decompression...
September 23, 2016: Journal of Neurological Surgery. Part A, Central European Neurosurgery
Feng Xu, Sida Pan, Nicholas C Bambakidis
Facial nerve schwannomas are rare, benign, nerve-sheath tumors. They can occur in any segment of the facial nerve, and often clinically and radiographically mimic the most common vestibular schwannoma when extending into the cerebellopontine angle. The optimal treatment strategy for intracranial facial nerve schwannomas remains controversial and includes observation, resection, and stereotactic radiosurgery. In this article, we review the natural history, clinical features, diagnosis and current management of facial nerve schwannomas...
September 28, 2016: World Neurosurgery
Houmehr Hojjat, Peter F Svider, Pedram Davoodian, Robert S Hong, Adam J Folbe, Jean Anderson Eloy, Mahdi A Shkoukani
OBJECTIVES/HYPOTHESIS: Our objective was to perform an economic analysis evaluating whether ordering a magnetic resonance imaging (MRI) is a cost-effective practice in the workup of undifferentiated asymmetric sensorineural hearing loss (ASNHL). Use of T1 gadolinium-weighted MR (GdT1W) and T2 weighted MR without contrast (T2MR) was each examined. METHODS: The incremental cost-effectiveness ratio (ICER) of MR imaging among ASNHL patients was evaluated using a decision tree...
September 30, 2016: Laryngoscope
Chandrasekaharan Kesavadas
No abstract text is available yet for this article.
September 2016: Neurology India
Samantha Anne, Samuel Trosman, Timothy Haffey, Raj Sindwani, Katie Geelan-Hansen
OBJECTIVE: The best imaging study for evaluation of pediatric hearing loss is debated and it is well known magnetic resonance imaging is more costly than computed tomography. The objective of this study is to evaluate charges of computed tomography temporal bone (CTTB) versus magnetic resonance imaging brain, internal auditory canal/cerebellopontine angle (MRI IAC/CPA), with and without sedation in the pediatric population in order to assess to what extent the charges for the procedure are increased...
October 2016: International Journal of Pediatric Otorhinolaryngology
Mohamad-Motaz Al Mahdi, Joachim K Krauss, Makoto Nakamura, Almuth Brandis, Bujung Hong
Ectopic recurrence of craniopharyngioma in the cerebellopontine angle after surgical resection of a suprasellar craniopharyngioma is rare. Thus, only 5 cases were reported with a delay ranging between 4 and 26 years after removal of the primary tumor. We report a unique case of ectopic recurrence of craniopharyngioma in the cerebellopontine angle, which occurred at only 4 months after surgical resection of the primary tumor. A 24-year-old man underwent resection of a suprasellar craniopharyngioma via a right pterional approach four months earlier...
March 28, 2016: Turkish Neurosurgery
Anna Lawson McLean, Steffen Rosahl
BACKGROUND: To date, few studies have been published about the growth dynamics of tumors associated with neurofibromatosis type-2 (NF2), none of which evaluated gender-specific differences. Our aim was to compare radiographic data of female and male patients with NF2. METHODS: MR images of 40 patients (20 female, 20 male) from the regional NF2 referral center were included in this analysis. Tumor sizes were determined by semi-automated volumetric measurement. Intracranial tumors were measured on post-contrast T1-weighted MRI datasets and volumes of intramedullary spinal tumors were determined from sagittal T2-weighted MRI datasets...
November 2016: Acta Neurochirurgica
Vassilios Tsitouras, Shelly Wang, Peter Dirks, James Drake, Eric Bouffet, Cynthia Hawkins, Suzanne Laughlin, James T Rutka
Chordomas are tumors arising from remnants of the embryological notochord, most commonly found in the spheno-occipital, spinal, or sacro-coccygeal areas. They are rare tumors in the pediatric population and are challenging to manage due to their difficult accessibility, proximity to important anatomy and extension into adjacent structures. We report a series of 10 children treated for chordoma at The Hospital for Sick Children focusing on their surgery, adjuvant therapy and long-term outcomes. A retrospective review involving patient charts, radiographic imaging, and pathology slides was performed for 10 chordoma patients during the period from 1987-2015...
August 30, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Anne van Linge, Gerard J J M Borsboom, Marjan H Wieringa, André Goedegebure
OBJECTIVE: To determine whether certain patient and tumor characteristics influence the progression of hearing loss in vestibular schwannoma (VS) patients. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center, Erasmus Medical Centre in Rotterdam, The Netherlands. PATIENTS: One hundred fifty-five patients referred from 2000 through 2010 with intracanalicular, small or medium sized, unilateral VS, managed without active treatment...
October 2016: Otology & Neurotology
Xiaojuan Deng, Jingqin Fang, Qingya Luo, Haipeng Tong, Weiguo Zhang
BACKGROUND: Ganglioneuroma is a rare benign tumor originating from the sympathetic nerves, and its origination from the trigeminal nerves is even rarer. Only 4 cases of ganglioneuroma originating from the trigeminal nerve have previously been reported, and these studies only reported conventional MRI manifestations. To our knowledge, the advanced MRI features of trigeminal ganglioneuroma have not been reported thus far. CASE PRESENTATION: This study reports a case of trigeminal ganglioneuroma in the left cerebellopontine angle...
2016: BMC Cancer
Nitin Marwaha, Jacqueline R Batanian, Jeroen R Coppens, Matthew J Pierson, Jennifer Richards-Yutz, Jessica Ebrahimzadeh, Arupa Ganguly, Miguel A Guzman
Melanocytoma are the melanocytic tumors originating from leptomeningeal melanocytes. Melanocytomas are commonly seen in the central nervous system (CNS) and are often associated with neurocutaneous melanosis (NCM). However, simultaneous presentation of intra-axial and extra-cranial melanocytoma is a very rare event. Here we report a unique case of 21-year-old male with intermediate grade subcutaneous melanocytoma, mimicking lipoma, occurred synchronously with an intracranial melanocytoma, not associated with NCM...
August 30, 2016: Journal of Cutaneous Pathology
Malene Kirchmann, Kirstine Karnov, Søren Hansen, Thomas Dethloff, Sven-Eric Stangerup, Per Caye-Thomasen
BACKGROUND: Reports on the natural history of tumor growth and hearing in patients with a vestibular schwannoma (VS) are almost exclusively short-term data. Long-term data are needed for comparison with results of surgery and radiotherapy. OBJECTIVE: To report the long-term occurrence of tumor growth and hearing loss in 156 patients diagnosed with an intracanalicular VS and managed conservatively. METHOD: In this longitudinal cohort study, diagnostic and follow-up magnetic resonance imaging and audiometry were compared...
August 26, 2016: Neurosurgery
Charles R J Daultrey, James W Rainsbury, Richard M Irving
This article discusses conservatively managed tumors, whether larger tumors at presentation are more likely to grow, and whether position at presentation corresponds with growth. A review is presented of more than 900 patients managed at Queen Elizabeth Hospital, Birmingham, between 1997 and 2012. Tumors were arbitrarily divided into 3 groups: intracanalicular (IC), and extracanalicular (EC) tumors measuring 1 to 10 mm or 11 to 20 mm at the cerebellopontine angle. This series shows that larger EC tumors grow faster than IC tumors and that EC tumors overall at presentation are more likely to grow than IC tumors...
October 2016: Otolaryngologic Clinics of North America
Chengrui Yan, Xiangyi Kong, Lanshu Yang, Wenbin Ma
In the central nervous system, cerebellopontine angle (CPA) lymphomas are rare; few cases have been reported. Lymphoplasmacytic lymphoma (LPL) in the CPA is rarer still, and often misdiagnosed as acoustic neuroma.We report a rare case of CPA LPL-a challenging diagnosis guided by clinical presentations, radiological signs, and postoperative pathological test.A 43-year-old woman presented with headaches. Her magnetic resonance imaging revealed an abnormal homogeneously enhancing mass in the left CPA. We present detailed analysis of her disease and review relevant literature...
August 2016: Medicine (Baltimore)
Jeffrey D Sharon, Benjamin G Northcutt, Nafi Aygun, Howard W Francis
OBJECTIVE: To study the quality and usability of magnetic resonance imaging (MRI) obtained with a cochlear implant magnet in situ. STUDY DESIGN: Retrospective chart review. SETTING: Tertiary care center. PATIENTS: All patients who underwent brain MRI with a cochlear implant magnet in situ from 2007 to 2016. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Grade of view of the ipsilateral internal auditory canal (IAC) and cerebellopontine angle (CPA)...
October 2016: Otology & Neurotology
Hossein Mahboubi, Yarah M Haidar, Omid Moshtaghi, Kasra Ziai, Yaser Ghavami, Marlon Maducdoc, Harrison W Lin, Hamid R Djalilian
OBJECTIVE: To investigate the 30-day postoperative complication, readmission, and reoperation rates following surgery for cerebellopontine angle (CPA) schwannomas. STUDY DESIGN: Cross-sectional analysis. SETTING: National surgical quality improvement program dataset (NSQIP) 2009 through 2013. PATIENTS: All surgical cases with an International Classification of Diseases, 9th edition, Clinical Modification (ICD-9-CM) diagnosis code of 225...
October 2016: Otology & Neurotology
Stylianos Pikis, Emil Margolin
Malignant transformation is a rare but devastating complication following partial resection of an intracranial epidermoid cyst (EC). Time to malignant transformation is highly variable and optimal management is unclear. A literature search from 1965 to January 2016 identified manuscripts discussing clinical presentation, management, and outcome of malignant transformation of a remnant intracranial EC. One male patient diagnosed with malignant transformation of a remnant intracranial EC in our institution was also included in the study...
November 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
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