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Cerebellopontine angle

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https://www.readbyqxmd.com/read/28413554/confounding-features-of-ectopic-craniopharyngioma-a-differential-for-tumors-showing-diffusion-restriction
#1
Sudha Karnan, Vanitha Krishnamoorthy, Kailasanathan Natarajan, Babu Peter Sathyanathan
Craniopharyngiomas comprise approximately 1-3% of all intracranial tumors and arise from squamous epithelial rests along remnants of Rathke's cleft. They have bimodal age distribution. The ectopic sites reported are the nasopharynx, sphenoid bone, pineal region, cerebellopontine angle and third ventricle. We report a case of ectopic craniopharyngioma in the Foramen of Monro with restricted diffusion, which have is an unusual feature, not commonly reported and is a potential pitfall.
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28413550/primary-intracranial-rhabdomyosarcoma-of-the-cerebellopontine-angle-mimicking-a-vestibular-schwannoma-in-a-child
#2
Prakash Nair, Kuntal Kanti Das, Arun K Srivastava, R N Sahu, Raj Kumar, Kamlesh Yadava, Rakesh Pandey
Primary intracranial rhabdomyosarcoma (PIRMS) is a rare neoplasm, which affects infants and young children. We report a rare case of a primary embryonal rhabdomyosarcoma of the cerebellopontine angle in a 7-year-old boy with clinical and radiological features mimicking a vestibular schwannoma. The patient underwent definitive surgery and radiotherapy and is recurrence free at 6 months. PIRMS commonly occur in parameningeal locations or metastasize to the brain from an extracranial primary. Gross total tumor resection followed by adjuvant radiotherapy remains the current standard of treatment; however, chemotherapy has also been tried with favorable results...
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28413544/abdominal-schwannoma-in-a-case-of-neurofibromatosis-type-2-a-report-of-a-rare-combination
#3
Khandkar Ali Kawsar, Md Raziul Haque, Forhad Hossain Chowdhury
Neurofibromatosis-2 (NF2) is an autosomal-dominant disease, which is characterized by vestibular schwannomas (VSs) (acoustic neurinoma) as well as tumours of the peripheral and central nervous system, demonstrating a variety of expression. A 12-year-old girl presented to us with headache and ataxia for four months. We examined and found a lump in the right side of her abdomen. On magnetic resonance imaging (MRI) of brain, a bilateral VS at the cerebellopontine (CP) angle was detected, and on computerized tomography (CT) scan and ultrasonography of her abdomen a large retroperitoneal schwannoma was revealed in the right side of her abdomen...
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28413536/primary-cerebellopontine-angle-glioblastoma-in-an-adult
#4
Souvagya Panigrahi, Sudhansu S Mishra, Srikant Das
Supratentorial glioblastoma is the most frequent primary intracranial tumor in adults. Its localization in the cerebellum is extremely rare and such tumor presenting as cerebellopontine angle (CPA) mass in an adult is even rarer. We report the case of primary cerebellar glioblastoma in a 52-year-old woman who presented clinically and radiologically as CPA mass. Its clinical presentation, radiological findings, and treatment instituted are discussed in view of pertinent literature.
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28400229/clinical-features-and-surgical-outcomes-in-patients-with-cerebellopontine-angle-hemangioblastomas-a-retrospective-series-of-23-cases
#5
Jian Cheng, Wenke Liu, Si Zhang, Ding Lei, Xuhui Hui
OBJECTIVE: Hemangioblastomas in the cerebellopontine angle (CPA) are uncommon and have rarely been reported. They may be easily misdiagnosed because of the atypical location, clinical and imaging features. The present study aimed to characterize clinical and radiological features, treatment strategies and outcomes in these rare lesions and to investigate various factors that may affect postoperative outcomes. METHODS: The medical records of patients with CPA hemangioblastomas who underwent surgery from 2003 to 2016 at the West China Hospital were reviewed retrospectively and statistically analyzed...
April 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28397378/basal-subarachnoid-hemorrhage-by-rupture-of-arteriovenous-malformation-at-the-cerebellopontine-angle
#6
Mio Takayama, Masayuki Kashiwagi, Kenji Hara, Aya Matsusue, Brian Waters, Natsuki Ikematsu, Shin-Ichi Kubo
A man in his late forties had lived as a recluse for more than ten years. He was found dead in his room. At autopsy, subarachnoid hemorrhage (SAH) was detected at the base of the brain, which weighed 1333 g. The cerebellar tonsil was swollen. The cerebral ventricle was enlarged and filled with blood. A hematoma was observed in the upper part of the left side of the cerebellar hemisphere. The location and size of SAH in this case indicated that the rupture of a cerebral aneurysm (CA) had occurred; however, CA was not detected...
April 10, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28392497/jugular-foramen-collision-tumor-schwannoma-and-plasma-cell-pseudotumor-a-probable-igg4-related-disease-a-case-report
#7
Mudathir S Bakhit, Masazumi Fujii, Shinya Jinguji, Taku Sato, Jun Sakuma, Kiyoshi Saito
Lower cranial nerve sheath tumors are relatively rare, and cases of schwannoma collision tumors have rarely been reported, with most of the reported cases describing schwannoma and meningioma collision tumors. We report a very rare case of a cerebellopontine angle collision tumor of the 9(th) cranial nerve schwannoma with an IgG4 plasma cell pseudotumor. IgG4 plasma cell pseudotumors comprise a group of diseases called IgG4-related diseases (IgG4-RDs). These diseases usually affect organs such as the pancreas and salivary gland...
April 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28387625/surgical-technique-and-results-of-cable-graft-interpositioning-of-the-facial-nerve-in-lateral-skull-base-surgeries-experience-with-213-consecutive-cases
#8
Sampath Chandra Prasad, Karthikeyan Balasubramanian, Enrico Piccirillo, Abdelkader Taibah, Alessandra Russo, Jingchun He, Mario Sanna
OBJECTIVE The aim in this study was to review the technique and outcomes of cable graft interpositioning of the facial nerve (FN) in lateral skull base surgeries. METHODS The authors retrospectively evaluated data from patients who had undergone cable graft interpositioning after nerve sacrifice during skull base tumor removal between June 1987 and May 2015. All patients had undergone lateral skull base approaches to remove tumors at a quaternary referral center in Italy. Facial nerve function was evaluated before and after surgery using the House-Brackmann (HB) grading system...
April 7, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28379624/surgical-removal-of-a-choroid-plexus-oncocytoma-in-an-adult-cat
#9
B Cossic, G Silver, M Kent, E N Glass, D Agnew, S McDonough, A D Miller
An 11-year-old male castrated domestic shorthair cat presented with left central vestibular dysfunction. Magnetic resonance imaging of the brain revealed a large, extra-parenchymal, strongly contrast-enhancing mass at the level of the left cerebellopontine angle and compressing the cerebellum and brainstem. The mass was surgically excised via left rostral and sub-tentorial craniectomies and histopathology revealed an epithelial neoplasm composed of anastomosing cords of neoplastic cells that contained large amounts of finely granular hypereosinophilic cytoplasm and round nuclei...
April 5, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28375911/trigeminal-neuralgia
#10
Giorgio Cruccu
PURPOSE OF REVIEW: Although trigeminal neuralgia is well known to neurologists, recent developments in classification and clinical diagnosis, new MRI methods, and a debate about surgical options necessitate an update on the topic. RECENT FINDINGS: Currently, a worldwide controversy exists regarding the classification, diagnostic process, and surgical treatment of trigeminal neuralgia. This controversy has been caused on one side by the recognition that some 50% of patients with trigeminal neuralgia, apart from characteristic paroxysmal attacks, also have continuous pain in the same territory, which results in greater diagnostic difficulties and is associated with a lower response to medical and surgical treatments...
April 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28366032/etiology-of-single-sided-deafness-and-asymmetrical-hearing-loss
#11
Shin-Ichi Usami, Ryosuke Kitoh, Hideaki Moteki, Shin-Ya Nishio, Tomohiro Kitano, Masafumi Kobayashi, Jun Shinagawa, Yoh Yokota, Kenjiro Sugiyama, Kizuki Watanabe
CONCLUSIONS: The present study revealed that various etiologies are involved in single-sided deafness (SSD), and that the cause of SSD and asymmetrical hearing loss (AHL) differed greatly between congenital/early-onset cases and adult cases. Clarification of the etiology is the first step toward providing appropriate intervention. OBJECTIVES: The study aimed to clarify the etiology of SSD and AHL patients. METHODS: The etiology of a total of 527 SSD or AHL patients who visited Shinshu University Hospital between 2006 and 2016 were analyzed by imaging as well as serological tests for mumps virus, and CMV DNA testing...
April 1, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28358248/atypical-choroid-plexus-papilloma-clinicopathological-and-neuroradiological-features
#12
Yu-Zhen Shi, Mao-Zhen Chen, Wei Huang, Li-Li Guo, Xiao Chen, Dan Kong, Ying-Ying Zhuang, Yi-Ming Xu, Rui-Rui Zhang, Gen-Ji Bo, Zhong-Qiu Wang
Background Atypical choroid plexus papilloma (APP) is a rare, newly introduced entity with intermediate characteristics. To date, few reports have revealed the magnetic resonance (MR) findings. Purpose To analyze the clinicopathological and MR features of APP. Material and Methods The clinicopathological data and preoperative MR images of six patients with pathologically proven APP were retrospectively reviewed. The MR features including tumor location, contour, signal intensity, degree of enhancement, intratumoral cysts, and necrosis; and flow voids, borders, peritumoral edema, and associated hydrocephalus were analyzed...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28332155/cerebellopontine-angle-tumors-in-young-children-displaying-cranial-nerve-deficits-and-restricted-diffusion-on-diffusion-weighted-imaging-a-new-clinical-triad-for-atypical-teratoid-rhabdoid-tumors
#13
Joel S Katz, Pier Paolo Peruzzi, Christopher R Pierson, Jonathan L Finlay, Jeffrey R Leonard
Atypical teratoid/rhabdoid tumors (AT/RT) of the central nervous system (CNS) are rare, highly malignant neoplasms that carry a poor prognosis. Even with prompt diagnosis, gross total resection and early initiation of intensive adjuvant therapy, the majority of patients will succumb within 9-12 months of diagnosis. The CPA location in children harbors lesions along a wide spectrum varying from benign to highly malignant. Imaging features of lesions within the CPA that aid the diagnostic process will help to initiate early treatment in higher-grade lesions...
March 22, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28291674/-trigeminal-neuralgia-secondary-to-petrous-endostosis
#14
Jacinto Mata-Gómez, Manuel Royano-Sánchez, Macarena Bejarano-Parra, Ignacio Gilete-Tejero, María Rico-Cotelo, Marta Ortega-Martínez
Arterial neurovascular compression is hypothesised to be the main cause of primary trigeminal neuralgia. Although it is the most common cause, other pathologies, such as tumours in the cerebellopontine angle, can cause trigeminal pain. We report a case of a 44-year-old female patient with right trigeminal neuralgia without satisfactory response to medical treatment. Cerebral MRI showed no structural injuries. During microvascular decompression of the trigeminal nerve, endostosis of the internal aspect of the petrous bone was found to compress the trigeminal nerve...
March 10, 2017: Neurocirugía
https://www.readbyqxmd.com/read/28271520/expanded-transcanal-transpromontorial-approach-to-the-internal-auditory-canal-pilot-clinical-experience
#15
Livio Presutti, Matteo Alicandri-Ciufelli, Marco Bonali, Alessia Rubini, Giacomo Pavesi, Alberto Feletti, Barbara Masotto, Lukas Anschuetz, Daniele Marchioni
OBJECTIVES/HYPOTHESIS: The aim of this study was to describe and evaluate the feasibility of an expanded transcanal transpromontorial approach, developed from the exclusive endoscopic transcanal transpromontorial approach. STUDY DESIGN: Retrospective case series. METHODS: Retrospective chart review of 10 patients operated by an expanded transcanal transpromontorial approach in two tertiary referral centers (University Hospital of Modena, Italy and University Hospital of Verona, Italy)...
March 8, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28246588/intermittent-facial-spasms-as-the-presenting-sign-of-a-recurrent-pleomorphic-adenoma
#16
Rosalie A Machado, Sami P Moubayed, Azita Khorsandi, Juan C Hernandez-Prera, Mark L Urken
The intimate anatomical relationship of the facial nerve to the parotid parenchyma has a significant influence on the presenting signs and symptoms, diagnosis and treatment of parotid neoplasms. However, to our knowledge, hyperactivity of this nerve, presenting as facial spasm, has never been described as the presenting sign or symptom of a parotid malignancy. We report a case of carcinoma arising in a recurrent pleomorphic adenoma of the left parotid gland (i.e., carcinoma ex pleomorphic adenoma) that presented with hemifacial spasms...
February 10, 2017: World Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28220368/embolization-of-ruptured-arteriovenous-malformations-in-the-cerebellopontine-angle-cistern
#17
Hidenori Endo, Shin-Ichiro Osawa, Yasushi Matsumoto, Toshiki Endo, Kenichi Sato, Kuniyasu Niizuma, Miki Fujimura, Teiji Tominaga
Among brainstem arteriovenous malformations (AVMs), there exist small AVMs predominantly located in the cerebellopontine angle cistern (CPAC) with minimal extension into the pial surface of the brainstem. However, previous studies of CPAC AVMs did not particularly discuss the role of embolization in the treatment of these lesions. This study was conducted to clarify the effectiveness and validity of embolization in the treatment of CPAC AVMs. We retrospectively reviewed five patients with CPAC AVMs who underwent endovascular treatment...
February 20, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28217958/65-year-old-female-with-cerebellopontine-angle-lesion
#18
Reena Baweja, Kesava Reddy, Anthony Whitton, John Provias, Boleslaw Lach
No abstract text is available yet for this article.
March 2017: Brain Pathology
https://www.readbyqxmd.com/read/28217158/extra-axial-medulloblastoma-in-the-cerebellopontine-angle-report-of-a-rare-entity-with-review-of-literature
#19
Ishita Pant, Sujata Chaturvedi, Vinod K S Gautam, Pranjal Pandey, Rima Kumari
With only 33 cases reported so far, a purely extra-axial position of medulloblastoma at cerebellopontine (CP) angle is quite exceptional. We report a case of extra-axial medulloblastoma in a 15-year-old male child located in the CP angle that was surgically treated with a provisional diagnosis of schwannoma. Histopathological diagnosis of medulloblastoma was made with the routine hematoxylin and eosin stain and immunohistochemical markers. This case report highlights the fact that although extremely rare, the possibility of an extra-axial mass being a medulloblastoma does exist...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28203025/-trigemino-cardiac-reflex-in-skull-base-surgery
#20
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
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