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Cerebellopontine angle

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https://www.readbyqxmd.com/read/28203025/-trigemino-cardiac-reflex-in-skull-base-surgery
#1
H Z Duan, Y Zhang, L Li, J Y Zhang, Z Q Yi, S D Bao
OBJECTIVE: To explore the mechanism, clinical features, and prognosis of Trigemino-cardiac reflex (TCR) during skull base operations. METHODS: A retrospective analysis was performed on 291 patients with skull base disease from Jan. 2009 to Oct. 2015 in Peking University First Hospital. By reviewing the patients' operative data and anaesthetic electrical record, and we picked out all the patients who suffered from TCR during the operation and analyzed their surgical procedures, clinical features, influence factors, and prognosis...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28192784/extra-axial-cerebellopontine-angle-medulloblastoma-in-an-infant
#2
Mukesh Kumar Bhaskar, Manish Jaiswal, Bal Krishna Ojha, Sunil Kumar Singh, Anil Chandra, Mukta Meel, Mohd Faheem
Medulloblastoma is a common tumor of the posterior fossa, representing 20-25% of all pediatric neoplasms. It commonly occurs in the midline (cerebellar vermis) and rarely at the cerebellopontine angle. Most of them are intra-axial, and an extra-axial location of this tumor is very rare. Extra-axial cerebellopontine angle medulloblastoma is extremely uncommon and has never been reported in an infant. We report an extra-axial cerebellopontine angle medulloblastoma in a 1-year-old child.
February 14, 2017: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28186449/efficacy-and-outcomes-of-facial-nerve-sparing-treatment-approach-to-cerebellopontine-angle-meningiomas
#3
Randy S D'Amico, Matei A Banu, Petros Petridis, Alexandra S Bercow, Hani Malone, Moshe Praver, Tony J C Wang, Steven R Isaacson, Michael B Sisti
OBJECTIVE Advanced microsurgical techniques contribute to reduced morbidity and improved surgical management of meningiomas arising within the cerebellopontine angle (CPA). However, the goal of surgery has evolved to preserve the quality of the patient's life, even if it means leaving residual tumor. Concurrently, Gamma Knife radiosurgery (GKRS) has become an acceptable and effective treatment modality for newly diagnosed, recurrent, or progressive meningiomas of the CPA. The authors review their institutional experience with CPA meningiomas treated with GKRS, surgery, or a combination of surgery and GKRS...
February 10, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28168739/intracranial-neuromuscular-choristoma-report-of-a-case-with-literature-review
#4
Antonella Coli, Mariangela Novello, Gianpiero Tamburrini, Manila Antonelli, Felice Giangaspero, Libero Lauriola
Neuromuscular choristoma (NMC), also called neuromuscular hamartoma or nerve rhabdomyoma, is a rare lesion of the spinal and cranial nerves composed of skeletal muscle intimately associated with nerve fibers. Its origin has not been precisely clarified and a malformative event, resulting from aberrant differentiation or a true neoplastic growth, have been proposed by authors. We hereby present a cerebellopontine angle NMC enlarging the eighth cranial nerve in a 3-year-old child, that histologically appeared composed of a large amount of striated muscle mixed with nerve fibers...
February 6, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28164776/inter-observer-variability-between-radiologists-reporting-on-cerebellopontine-angle-tumours-on-magnetic-resonance-imaging
#5
S R Teh, S Ranguis, P Fagan
BACKGROUND: Studies demonstrate the significance of intra- and inter-observer variability when measuring cerebellopontine angle tumours on magnetic resonance imaging, with measured differences as high as 2 mm. OBJECTIVE: To determine intra- and inter-observer measurement variability of cerebellopontine angle tumours in a specialised institution. METHODS: The magnetic resonance imaging maximal diameter of 12 randomly selected cerebellopontine angle tumours were independently measured by 4 neuroradiologists at a tertiary referral centre using a standard definition for maximal tumour diameter...
January 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28134648/symptomatic-trigeminal-neuralgia-caused-by-cerebellopontine-angle-tumors
#6
Pengfei Liu, Chenlong Liao, Wenxiang Zhong, Min Yang, Shiting Li, Wenchuan Zhang
To investigate the characteristics of symptomatic trigeminal neuralgia (TN) caused by tumors and the relationship between anatomicosurgical findings and tumor type, the authors undertook a retrospective review of 35 patients with symptomatic TN between 2006 and 2015. The tumors included 16 meningiomas, 14 epidermoids, 4 vestibular schwannomas, and 1 hemangioblastoma. The studies show that patients with tumor-induced TN were significantly younger than those idiopathic TN (P <0.05). Meningioma-induced TN tended to have responsible vessels, while epidermoid tumor seemed to cause TN by wrapping or compressing the nerve...
January 27, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28110401/evaluating-the-utility-of-a-scoring-system-for-lipomas-of-the-cerebellopontine-angle
#7
Carlito Lagman, Brittany L Voth, Lawrance K Chung, Timothy T Bui, Seung J Lee, Natalie E Barnette, Quinton Gopen, Isaac Yang
BACKGROUND: Cerebellopontine angle (CPA) lipomas are rare, benign, slow-growing masses. Resections are considered in symptomatic patients who are refractory to targeted medical therapies, but at those stages the lipomas have often reached considerable sizes and encompass critical neurovascular structures. The objective of this study is to develop and to evaluate the utility of a scoring system for CPA lipomas. The hypothesis is that CPA lipomas with lower scores are probably best managed with early surgery...
January 21, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28109103/-value-of-diffusion-weighted-imaging-1-h-magnetic-resonance-spectroscopy-and-3d-whole-brain-arterial-spin-labeling-in-the-diagnosis-of-medulloblastoma
#8
Dong-Liang Cheng, Wen-Sheng Wang, Yi-Xin Hu, Meng-Lin Chen, Ge Wen, Li-Na Cheng, Jing Wu, Liu-Qing Yan
OBJECTIVE: To explore the value of diffusion-weighted imaging (DWI), (1)H-magnetic resonance spectroscopy (1H-MRS) and 3D whole-brain arterial spin labeling (3D ASL) in the diagnosis of medulloblastoma in the posterior cranial fossa. METHODS: The magnetic resonance imaging (MRI) findings of 16 patients with pathologically confirmed medulloblastoma in the posterior cranial fossa were analyzed retrospectively. All the patients were examined with plane and enhanced brain MRI scans; 5 patients also underwent examinations with DWI, 12 with MRS, and 5 with 3D ASL...
January 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28049034/hypervascular-lesions-of-the-cerebellopontine-angle-the-relevance-of-angiography-as-a-diagnostic-and-therapeutic-tool-and-the-role-of-stereotactic-radiosurgery-in-management-a-comprehensive-review
#9
REVIEW
Yosef Laviv, Ajith Thomas, Ekkehard M Kasper
The cerebellopontine angle (CPA) is a narrowed skull base area, containing important cranial nerves and vessels and bordering with eloquent areas of the posterior fossa. Tumors of the CPA are a heterogeneous group and can arise extradural, intradural-extraaxial or intraaxial. Accordingly, their vascular supply changes, depending on their anatomical origin. Symptomatic, large CPA tumors require surgical resection in order to prevent irreversible, severe neurological damages. However, its tight and strategical location make surgery in the CPA very challenging and require appropriate pre-surgical planning...
December 31, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28042016/spontaneous-intraventricular-hemorrhage-a-rare-presentation-of-a-skull-base-mesenchymal-chondrosarcoma
#10
Altaf Ali Laghari, Gohar Javed, Muhammad Faheem Khan, Syed Ijlal Ahmed, Karim Rizwan Nathani, Riyasat Ahmed
INTRODUCTION: Chondrosarcomas (CSA) are very rare malignant slow growing tumors which develop in or near the petroclival region of the brain. We report our experience of a very rare case in which the tumor originated from left petrous bone and induced intraventricular hemorrhage (IVH) leading to an acute comatose presentation. CASE DESCRIPTION: A 28 year old male initially presented in outpatient department (OPD) with a 1 month history of headache, vomiting, vertigo and left facial numbness...
December 29, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28013334/cerebellopontine-angle-medulloblastoma-with-extensive-nodularity-in-a-child-case-report-and-review-of-the-literature
#11
Raywat Noiphithak, Vich Yindeedej, Chatchai Thamwongskul
BACKGROUND: Cerebellar medulloblastomas (MBs) are one of the most common posterior fossa tumors in children but rarely occur in the cerebellopontine angle (CPA). Only 39 cases of CPA MBs were reported in the literature, and most of them were classic and desmoplastic MBs. CASE PRESENTATION: A 22-month-old girl presented with progressive cerebellar ataxia. Magnetic resonance imaging showed a large tumor in the right CPA and obstructive hydrocephalus. Surgical resection was performed and achieved total tumor removal...
December 24, 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27999709/-microsurgical-approach-to-the-ambient-cistern
#12
Pablo Ajler, Michael Cruz Bravo, Lucas Garategui, Ezequiel Goldschmidt, Gustavo Isolan, Álvaro Campero
OBJECTIVE: To describe a step-by-step approach to the ambient cistern by the suboccipital retrosigmoid supracerebellar infratentorial (RSI) approach. DESCRIPTION: The RSI approach is performed in the same manner as the suboccipital retrosigmoid approach, usually used to access the pathology of the cerebellopontine angle, with the following modifications: (1) we always use the semi-sitting position, (2) the craniotomy-craniectomy must expose the transverse sinus and extend 5 cm medially to the inion, (3) when performing the dural opening it is necessary to mobilize the dura with the transverse sinus upwards, (4) under magnification with surgical microscope the cerebellomedullary cistern should be opened in order to drain cerebrospinal fluid for relaxing the cerebellum, and (5) arachnoidal adherences and bridging veins must be coagulated and cut if necessary...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27958603/a-connection-between-neurovascular-conflicts-within-the-cerebellopontine-angle-and-vestibular-neuritis-a-case-controlled-cohort-study
#13
B Loader, I Linauer, S Korkesch, I Krammer-Effenberger, V Zielinski, N Schibany, A Kaider, E Vyskocil, D Tscholakoff, P Franz
This retrospective, observer blinded case-control study aims to compare the prevalence of neurovascular conflicts (NVCs) of the vestibulocochlear nerve and the anterior inferior cerebellar artery (AICA) in patients presenting with clinical signs of acute vestibular neuritis with and without subsequent objective vestibular function loss (VFL). 58 acute cases of clinically suspected acute vestibular neuritis were investigated with same day cranial MRI at a tertiary referral centre and compared to 61 asymptomatic controls...
October 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/27935543/acoustic-neuroma-as-first-sign-of-inner-ear-functional-disorders
#14
Marzena Bielińska, Kalina Owczarek, Joanna Nowosielska-Grygiel, Jurek Olszewski, Piotr Pietkiewicz
INTRODUCTION: The aim of this work was to describe acoustic neuromas as the first signs of inner ear functional disorders. MATERIAL AND METHODS: The study covered 3,456 audiological and otoneurological patients, who were treated in the Department of Otolaryngology, Laryngological Oncology, Audiology and Phoniatrics Military Medical Academy University Teaching Hospital in Lodz within the period of 2011-2016. Among the studied subjects, an acoustic neuroma on the vestibulocochlear nerve was diagnosed in 13 cases (5,16%), including 9 women and 4 men...
October 31, 2016: Otolaryngologia Polska. the Polish Otolaryngology
https://www.readbyqxmd.com/read/27933249/an-enterogenous-cyst-with-atypical-pathological-findings-and-chemical-meningitis
#15
Lu Wang, Xiaona Chang, Chao Fu, Weidong Yu, Xiaoxuan Fang
INTRODUCTION: Intracranial enterogenous cysts are rare and mainly occur in the posterior fossa. These cysts are usually extra-axial, midline, anterior to the brainstem, or at the cerebellopontine angle. We report a case of an enterogenous cyst in which diagnosis was difficult because the lesion showed atypical pathologic findings. CASE PRESENTATION: A healthy 41-year-old man complained of paroxysmal occipital headaches lasting over a week, with increased severity for 3 days accompanied by slight dizziness and mild nausea...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27932747/-a-rare-case-of-metastatic-brain-tumors-in-the-bilateral-cerebellopontine-angles
#16
Yasuhiro Node, Naoyuki Harada, Hiroyuki Masuda, Kosuke Kondo, Masaaki Nemoto, Nobuo Sugo
We encountered a rare case of metastatic brain tumors in the bilateral cerebellopontine angles. The patient was a 61-year-old man, who visited an otorhinolaryngology clinic with complaints of rapidly progressing bilateral hearing impairment and facial palsy. The patient was referred to our hospital because tumorous lesions were suspected in the bilateral cerebellopontine angles on brain magnetic resonance imaging. Regarding tumor markers, the patient's cancer antigen 19-9 and carcinoembryonic antigen levels were high, which suggested metastasis...
December 2016: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/27929602/facial-reanimation-according-to-the-postresection-defect-during-lateral-skull-base-surgery
#17
John P Leonetti, Sahar Nadimi, Sam J Marzo, Douglas Anderson, Darl Vandevender
The vast majority of benign tumors of the cerebellopontine angle, temporal bone, and parotid gland can be successfully resected without permanent injury to the facial nerve. Malignant tumors or recurrent disease may require facial nerve sacrifice, especially if preoperative facial paresis is present. This article will present case examples of the various methods to reconstruct facial animation after lateral skull base resections that require sacrifice of cranial nerve VII, and the associated mimetic facial musculature...
December 2016: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/27913261/typical-symptoms-of-normal-pressure-hydrocephalus-caused-by-choroid-plexus-papilloma-in-the-cerebellopontine-angle
#18
Hiroshi Ito, Yukiko Nakahara, Masatou Kawashima, Jun Masuoka, Tatsuya Abe, Toshio Matsushima
BACKGROUND: Choroid plexus papillomas (CPPs) are rare benign intracranial tumors. We report a rare case of CPP manifesting with typical symptoms of normal-pressure hydrocephalus rather than obstructive hydrocephalus. CASE DESCRIPTION: A 45-year-old woman presented with a 6-year history of headache and typical symptoms of normal-pressure hydrocephalus, including gait disturbance, urinary incontinence, and cognitive dysfunction, in addition to the more common symptoms of CPP, such as lower cranial nerve dysfunctions and ataxia...
November 29, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27898606/facial-nerve-meningioma-a-cause-of-pediatric-facial-weakness
#19
Nicholas L Deep, Sharon H Gnagi, David F Carpentieri, P David Adelson, Peter A Weisskopf
OBJECTIVE: To present an unusual case of a temporal bone meningioma with intrafascicular spread throughout the temporal facial nerve from cerebellopontine angle (CPA) to stylomastoid foramen. PATIENT: Four-year-old female with progressive facial weakness and normal hearing. MAIN OUTCOME MEASURE: Clinical, radiological, and histopathological findings of temporal bone meningiomas. RESULTS: A patient presented with progressive facial weakness and normal hearing...
March 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/27897128/defining-the-limits-of-endoscopic-access-to-internal-auditory-canal
#20
Adam Master, Mickie Hamiter, Maura Cosetti
OBJECTIVE: To quantify surgical access to the internal auditory canal (IAC) using an exclusively endoscopic transcanal approach (EETA) and investigate surgically relevant relationships with neurovascular and osseous landmarks of the temporal bone. MATERIALS AND METHODS: Anatomical dissection of two paired temporal bones and 15 unpaired temporal bones was performed using an exclusively endoscopic approach to IAC. The dissection proceeded until the cerebellopontine angle (CPA) could be accessed...
November 28, 2016: Journal of International Advanced Otology
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