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Posterior fossa tumors

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https://www.readbyqxmd.com/read/28924528/near-fatal-gastrointestinal-hemorrhage-in-a-child-with-medulloblastoma-on-high-dose-dexamethasone
#1
Derek Yecies, Daniel Tawfik, Jennifer Damman, Chad Thorson, David S Hong, Gerald A Grant, Rachel Bensen, Mihaela Damian
A four-year-old female was admitted to a university-based children's hospital with a newly-diagnosed posterior fossa tumor. She was started on famotidine and high-dose dexamethasone and underwent gross total resection of a medulloblastoma. She was continued on dexamethasone and famotidine. She exhibited postoperative posterior fossa syndrome and was started on enteral feeds via the nasoduodenal tube. She had small gastrointestinal bleeds on postoperative days eight, 11, and 18, and was found to have a well-circumscribed posterior duodenal ulcer...
July 7, 2017: Curēus
https://www.readbyqxmd.com/read/28914866/-extended-endoscopic-endonasal-posterior-transclival-approach-to-tumors-of-the-clival-region-and-ventral-posterior-cranial-fossa-part-1-topographic-and-anatomical-features-of-the-clivus-and-adjacent-structures
#2
A N Shkarubo, K V Koval', G F Dobrovol'skiy, M A Shkarubo, V V Karnaukhov, B A Kadashev, D N Andreev, I V Chernov, O A Gadzhieva, O Yu Aleshkina, E A Anisimova, P L Kalinin, M A Kutin, D V Fomichev, O I Sharipov, D B Ismailov, E S Selivanov
OBJECTIVE: to describe the main topographic and anatomical features of the clival region and its adjacent structures for improvement and optimization of the extended endoscopic endonasal posterior (transclival) approach for resection of tumors of the clival region and ventral posterior cranial fossa. MATERIAL AND METHODS: We performed a craniometric study of 125 human skulls and a topographic anatomical study of heads of 25 cadavers, the arterial and venous bed of which was stained with colored silicone (the staining technique was developed by the authors) to visualize bed features and individual variability...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28904578/rosette-forming-glioneuronal-tumor-a-rare-posterior-fossa-tumor-in-an-adolescent
#3
Goutam Bera, Amitabha Das, Sandip Chatterjee, Uttara Chatterjee
Rosette-forming glioneuronal tumor (RGNT) is a rare variety of slow growing mixed glioneuronal tumor involving primarily fourth ventricular region and occurring predominantly in young adults. We present a case of a 16-year-old boy who presented with dizziness and occipital headache. On radiological evaluation, a fairly large hypodense posterior fossa mass lesion in relation to the left side of the vermis, with a large cystic component was found. Surgical resection of the tumor was performed. Histopathological examination showed a biphasic tumor composed of bland neurocytic cells, arranged in the form of neurocytic rosettes along with glial areas resembling low-grade glioma...
April 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28900335/rhabdoid-meningioma-of-brain-a-rare-aggressive-tumor
#4
Sajeeb Mondal, Rajashree Pradhan, Subrata Pal, Sharmistha Chatterjee, Arindam Bandyapadhyay, Debosmita Bhattacharyya
Rhabdoid meningioma is a rare aggressive variant of meningioma, regarded as WHO Grade III type. Histologically and cytologically, it is distinctive type having abundant eosinophilic cytoplasm, cytoplasmic inclusion with eccentrically placed vesicular nuclei and prominent nucleoli. High recurrence rate and poor outcome are important features. Here, we are presenting a rare case of rhabdoid meningioma found in a recurrent meningioma of the posterior fossa in a middle-aged female. We emphasized the squash cytology and histology finding of the rare neoplasm...
April 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/28891898/vascular-anomalies-of-posterior-fossa-and-their-implications
#5
Rajani Singh, Raj Kumar, Arushi Kumar
Posterior fossa houses very vital and sensitive structures namely midbrain, pons, medulla, and cerebellum. These structures are irrigated by vertebral, posterior inferior cerebellar, anterior inferior cerebellar, and superior cerebellar arteries. Parts of brain located in posterior fossa control important parts of body so any variation pertaining to stenosis, atresia, hypoplasia, fenestration, agenesis, and duplication in the arteries supplying these parts alter the irrigation pattern culminating into various morbid and mortal neurologic disorders...
September 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28872510/massive-intradural-dermoid-cyst-without-sinus-tract
#6
William Abouhassan, John Kuang Chao, James A Lehman
Dermoid cysts can present as a rare, benign, congenital intracranial tumor of neuroectoderm origin trapped during embryogenesis. Past clinical reports have reported lesions in the posterior fossa, at the midline, and in the intradural region all in conjunction with a superficial sinus tract. The authors present a unique patient of a completely intracranial, intradural, dermoid tumor of the midline cerebellum devoid of any evidence of sinus tract. The histological characteristics, radiological features, and management of this unusual patient are described...
September 1, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28868306/pseudotumoral-acute-cerebellitis-associated-with-mumps-infection-in-a-child
#7
Houda Ajmi, Mehdi Gaha, Sameh Mabrouk, Saida Hassayoun, Noura Zouari, Jalel Chemli, Saoussen Abroug
Pseudotumoral cerebellitis in childhood is an uncommon presentation of cerebellitis mimicking a brain tumor. It often follows an inflammatory or infectious event, particularly due to varicella virus. Patients could have a wide clinical spectrum on presentation. Some patients may be asymptomatic or present at most with mild cerebellar signs, whereas others may suffer severe forms with brainstem involvement and severe intracranial hypertension mimicking tumor warranting surgical intervention. Imaging techniques especially multimodal magnetic resonance imaging represent an interesting tool to differentiate between posterior fossa tumors and acute cerebellitis...
August 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28868253/relationships-between-regional-radiation-doses-and-cognitive-decline-in-children-treated-with-cranio-spinal-irradiation-for-posterior-fossa-tumors
#8
Elodie Doger de Speville, Charlotte Robert, Martin Perez-Guevara, Antoine Grigis, Stephanie Bolle, Clemence Pinaud, Christelle Dufour, Anne Beaudré, Virginie Kieffer, Audrey Longaud, Jacques Grill, Dominique Valteau-Couanet, Eric Deutsch, Dimitri Lefkopoulos, Catherine Chiron, Lucie Hertz-Pannier, Marion Noulhiane
Pediatric posterior fossa tumor (PFT) survivors who have been treated with cranial radiation therapy often suffer from cognitive impairments that might relate to IQ decline. Radiotherapy (RT) distinctly affects brain regions involved in different cognitive functions. However, the relative contribution of regional irradiation to the different cognitive impairments still remains unclear. We investigated the relationships between the changes in different cognitive scores and radiation dose distribution in 30 children treated for a PFT...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28868190/upward-migration-and-peroral-extrusion-of-a-peritoneal-shunt-catheter-case-report-and-review-of-the-literature
#9
Asra Al Fauzi, Wihasto Suryaningtyas, Joni Wahyuhadi, M Arifin Parenrengi, Agus Turchan, Maria C Wijaya, Michael Jonatan, Mahyudanil, Hanis Setyono
BACKGROUND: Various complications after ventriculoperitoneal (VP) shunt surgery have been reported, but peroral extrusion of peritoneal catheter is an extremely rare complication, and only 20 cases have been reported since 1987. The pathophysiology still remains unclear and the management is challenging. CASE DESCRIPTION: A 5-year-old boy presented with a catheter coming out of his mouth. The boy had a posterior fossa tumor surgery and had VP shunt insertion 1 year earlier...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28867398/visual-and-ocular-motor-outcomes-in-children-with-posterior-fossa-tumors
#10
Crandall E Peeler, Jane C Edmond, Jeffrey Hollander, Jamie K Alexander, David Zurakowski, Nicole J Ullrich, Peter E Manley, Gena Heidary
PURPOSE: To describe the clinical characteristics and visual and ocular motor outcomes of a large cohort of pediatric patients treated for tumors of the posterior cranial fossa. METHODS: The medical records of all patients with posterior fossa tumors evaluated by the ophthalmology services at two large tertiary care academic hospitals between 2005 and 2011 were reviewed retrospectively. Data abstracted for each study patient included demographic information, presenting signs and symptoms, pathologic diagnosis, and results of the most recent ophthalmology examination...
August 31, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28866068/treating-csf-rhinorrhea-without-dura-repair-a-case-report-of-posterior-fossa-choroid-plexus-papilloma
#11
François Lechanoine Resident, Ilyess Zemmoura, Stéphane Velut
BACKGROUND: Choroid plexus papilloma revealed by non traumatic cerebrospinal fluid (CSF) rhinorrhea had only been described five times in the literature. The challenges in this situation are to recognize CSF leak, to rapidly understand the pathophysiology of the leak, and to choose the best treatment strategy in emergency. We report an original case of posterior fossa choroid plexus papilloma revealed by CSF leak. We then discuss the surgical strategy and the pathophysiology of CSF leak, which is explained, in this case, by both hyperproduction of CSF and local skull base erosion...
August 30, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28863455/characterization-of-2-novel-ependymoma-cell-lines-with-chromosome-1q-gain-derived-from-posterior-fossa-tumors-of-childhood
#12
Vladimir Amani, Andrew M Donson, Seth C Lummus, Eric W Prince, Andrea M Griesinger, Davis A Witt, Todd C Hankinson, Michael H Handler, Kathleen Dorris, Rajeev Vibhakar, Nicholas K Foreman, Lindsey M Hoffman
Ependymoma (EPN) is a common brain tumor of childhood that, despite standard surgery and radiation therapy, has a relapse rate of 50%. Clinical trials have been unsuccessful in improving outcome by addition of chemotherapy, and identification of novel therapeutics has been hampered by a lack of in vitro and in vivo models. We describe 2 unique EPN cell lines (811 and 928) derived from recurrent intracranial metastases. Both cell lines harbor the high-risk chromosome 1q gain (1q+) and a derivative chromosome 6, and both are classified as molecular group A according to transcriptomic analysis...
July 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/28838109/endoscopic-endonasal-interdural-middle-fossa-approach-to-the-maxillary-nerve-anatomic-considerations-and-surgical-relevance
#13
Kumar Abhinav, David Panczykowski, Wei-Hsin Wang, Carl H Synderman, Paul A Gardner, Eric W Wang, Juan C Fernandez-Miranda
BACKGROUND: The maxillary nerve (V2) can be approached via the open middle fossa approach. OBJECTIVE: To delineate the anatomy of V2 and its specific segments with respect to the endonasal landmarks. We present the endoscopic endonasal interdural middle fossa approach to V2 and its potential application for the treatment of perineural spread in sinonasal/skull base tumors. METHODS: Five human head silicon-injected specimens underwent bilateral endoscopic endonasal transpterygoid approaches...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28828497/freiburg-neuropathology-case-conference-cystic-posterior-fossa-tumor
#14
Christian A Taschner, S Doostkam, J M Shah, H Urbach, M Jäger, M Prinz
No abstract text is available yet for this article.
August 21, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28820309/advanced-cone-beam-ct-venous-angiographic-imaging
#15
Visish M Srinivasan, Gouthami Chintalapani, Edward A M Duckworth, Peter Kan
OBJECTIVE The evaluation of the venous neurovasculature, especially the dural venous sinuses, is most often performed using MR or CT venography. For further assessment, diagnostic cerebral angiography may be performed. Three-dimensional rotational angiography (3D-RA) can be applied to the venous system, producing 3D rotational venography (3D-RV) and cross-sectional reconstructions, which function as an adjunct to traditional 2D digital subtraction angiography. METHODS After querying the database of Baylor St...
August 18, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28816956/differential-diagnosis-of-posterior-fossa-brain-tumors-multiple-discriminant-analysis-of-tl-spect-and-fdg-pet
#16
Moritaka Yamauchi, Tomohisa Okada, Tsutomu Okada, Akira Yamamoto, Yasutaka Fushimi, Yoshiki Arakawa, Susumu Miyamoto, Kaori Togashi
This study investigated the combined capability of thallium-201 (Tl)-SPECT and fluorine-18-fluoro-deoxy-glucose (FDG)-PET for differential diagnosis of posterior fossa brain tumors using multiple discriminant analysis.This retrospective study was conducted under approval of the institutional review board. In the hospital information system, 27 patients with posterior fossa intra-axial tumor between January 2009 and June 2015 were enrolled and grouped as the following 7 entities: low grade glioma (LGG) 6, anaplastic astrocytoma (AA) 2, glioblastoma (GBM) 3, medulloblastoma (MB) 3, hemangioblastoma (HB) 6, metastatic tumor (Mets) 3, and malignant lymphoma (ML) 4...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28808799/transorbital-endoscopic-approach-for-exposure-of-the-sylvian-fissure-middle-cerebral-artery-and-crural-cistern-an-anatomical-study
#17
João Paulo Almeida, Armando S Ruiz-Treviño, Sathwik R Shetty, Sacit B Omay, Vijay K Anand, Theodore H Schwartz
BACKGROUND: The availability of minimal access instrumentation and endoscopic visualization has revolutionized the field of minimally invasive skull base surgery. The transorbital endoscopic approach using an eyelid incision has been proposed as a new minimally invasive technique for the treatment of skull base pathology, mostly extradural tumors. Our study aims to evaluate the anatomical aspects and potential role of the transorbital endoscopic approach for exposure of the sylvian fissure, middle cerebral artery and crural cistern...
August 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28804042/four-hand-suction-irrigation-technique-leads-to-gross-total-resection-and-long-term-progression-free-survival-in-fourth-ventricular-ependymoma
#18
Sascha Marx, Ehab El Refaee, Soenke Langner, Henry W S Schroeder
BACKGROUND: Gross total resection is often avoided in posterior fossa ependymoma surgery due to the fear of permanent neurological deficits after operation. However, the extent of resection is a major prognostic factor for progression free and overall survival. The present study evaluates the outcome of posterior fossa ependymoma gross total resection in adult patients using a four-hand suction-irrigation technique at the floor of the fourth ventricle. METHODS: All surgical procedures for posterior fossa ependymomas performed since 2001 in the Department of Neurosurgery, University Medicine Greifswald, were analysed...
August 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28777430/long-noncoding-rna-ccat1-promotes-cell-proliferation-and-metastasis-in-human-medulloblastoma-via-mapk-pathway
#19
Ran Gao, Rui Zhang, Cuicui Zhang, Li Zhao, Yue Zhang
BACKGROUND: Medulloblastoma is the most common posterior fossa tumor in children and one that easily metastasizes. The mechanisms of how the medulloblastoma develops and progresses remain to be elucidated. The present study aimed to assess the role of long noncoding colon cancer-associated transcript-1 (lncRNA CCAT1) in cell proliferation and metastasis in human medulloblastoma. METHODS: Levels of CCAT1 were measured in samples and cell lines of medulloblastoma...
August 3, 2017: Tumori
https://www.readbyqxmd.com/read/28761280/recurrent-keratocystic-odontogenic-tumor-of-right-maxillary-sinus-involving-the-right-infraorbital-rim
#20
Karthikeyan Maruthamuthu, G Vasupradha, Janardhanam Dineshshankar, Abishek Rajaram Balaji
Keratocystic odontogenic tumor (KCOT) is a benign odontogenic tumor with an aggressive behavior and high recurrence rate. The most common site of predilection is the posterior mandible. In contrast, KCOTs occurring in the maxillary region are relatively rare. However, the maxillary involvement poses a greater and increased threat, due to proximity to vital structures such as maxillary sinus, orbital floor, and infratemporal fossa. This report presents such a case of KCOT involving the maxillary sinus eroding the floor of the orbit and provides an account of the factors that need to be considered during management...
January 2017: National Journal of Maxillofacial Surgery
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