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https://www.readbyqxmd.com/read/28543840/imaging-of-nuclear-overhauser-enhancement-at-7-and-3%C3%A2-t
#1
Yuanyu Shen, Gang Xiao, Zhiwei Shen, Xiaolei Zhang, Xiangyong Tang, Wei Hu, Zhiyan Zhang, Jitian Guan, Renhua Wu
Nuclear Overhauser enhancement (NOE) is a type of magnetization transfer using cross-relaxation. It originates from mobile macromolecules, which may have relevance to the evaluation of tumor features. We studied the value of NOE imaging at 7 and 3 T and suggest a utility for diagnosing human brain tumors. Two types of protein solution at different concentrations and pH values, and six normal Sprague Dawley (SD) rats, were used to detect NOE signal with a 7 T scanner. Then, six healthy volunteers and 11 patients with brain tumors (six gliomas and five meningiomas) were included at 3 T...
May 24, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28541579/tailored-extended-bifrontal-craniotomy-for-anterior-skull-base-tumors-anatomic-description-of-a-modified-surgical-technique-and-case-series
#2
Michael M Safaee, Michael W McDermott, Arnau Benet, Philip V Theodosopoulos
BACKGROUND: Open transcranial approaches to the anterior skull base remain an integral component of current skull base practice. Evolution of these and other techniques has resulted in revisions of standard, tried-and-true methods in attempts to improve patient outcomes and cosmesis, while still providing the best combination of surgical exposure and ergonomics. OBJECTIVE: To describe a modified approach for midline tumors of the anterior skull base. METHODS: We describe the anatomy and techniques of a modified extended bifrontal craniotomy for anterior skull base tumors...
May 24, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28541487/tumor-progression-following-petroclival-meningioma-subtotal-resection-a-volumetric-study
#3
Jacob B Hunter, Brendan P O'Connell, Matthew L Carlson, Lola C Chambless, Robert J Yawn, Ray Wang, Akshitkumar Mistry, Reid C Thompson, Kyle D Weaver, George B Wanna
BACKGROUND: One study has investigated postoperative growth rates following subtotal resection of petroclival meningiomas utilizing linear measurements, which are insensitive to the multidimensional complex growth of meningiomas, to estimate tumor volume. OBJECTIVE: To describe petroclival meningioma growth patterns following less-than-complete resection utilizing volumetric analysis and to identify variables associated with tumor progression. METHODS: Patients with surgically resected WHO grade I petroclival meningiomas were retrospectively reviewed (1999-2015)...
May 24, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28540120/remote-cerebellar-hemorrhage-report-of-two-different-cases
#4
Alireza Tabibkhooei, Morteza Taheri, Arash Fattahi, Feyzollah Ebrahimniya, Mohsen Benam
BACKGROUND: Remote cerebellar hemorrhage (RCH) is a rare complication after supratentorial craniotomies, which usually presents as linear hemorrhages on the surface of the cerebellum; the exact mechanism of it is not established yet. CASE DESCRIPTION: In case one, a 57-year-old patient demonstrated hemorrhage in the cerebellar sulci in favor of RCH 2 days after craniotomy for sphenoidal wing meningioma resection. He was asymptomatic and showed good prognosis after conservative treatment...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28537882/correlation-between-apparent-diffusion-coefficient-adc-and-cellularity-is-different-in-several-tumors-a-meta-analysis
#5
Alexey Surov, Hans Jonas Meyer, Andreas Wienke
The purpose of this meta-analysis was to provide clinical evidence regarding relationship between ADC and cellularity in different tumors based on large patient data.Medline library was screened for associations between ADC and cell count in different tumors up to September 2016. Only publications in English were extracted. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement (PRISMA) was used for the research.Overall, 39 publications with 1530 patients were included into the analysis...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28536991/diffuse-midline-skull-base-meningiomas-identification-of-a-rare-and-aggressive-subgroup-of-meningiomas
#6
Matthieu Peyre, Loïc Feuvret, Marc Sanson, Soledad Navarro, Anne-Laure Boch, Hugues Loiseau, Michel Kalamarides
Skull base meningiomas may present as clinically aggressive tumors despite being histologically benign. Here we describe a clinico-radiological entity of diffuse midline skull base meningiomas responsible for several neurological morbidities, including hearing and vision loss, intracranial hypertension, secondary hydrocephalus and tonsillar herniation with spinal cord compression. Surgery and radiotherapy were ineffective in stopping the clinical course of those tumors. After targeted sequencing of known mutated genes in meningiomas, we discovered TRAF7 mutations in two out of four tumors, stressing the importance of focusing the research efforts of the meningioma community in understanding the mechanisms underlying TRAF7 related meningioma tumorigenesis...
May 23, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28536486/emerging-indications-for-fractionated-gamma-knife-radiosurgery
#7
Emory McTyre, Corbin A Helis, Michael Farris, Lisa Wilkins, Darrell Sloan, William H Hinson, J Daniel Bourland, William A Dezarn, Michael T Munley, Kounosuke Watabe, Fei Xing, Adrian W Laxton, Stephen B Tatter, Michael D Chan
BACKGROUND: Gamma Knife radiosurgery (GKRS) allows for the treatment of intracranial tumors with a high degree of dose conformality and precision. There are, however, certain situations wherein the dose conformality of GKRS is desired, but single session treatment is contraindicated. In these situations, a traditional pin-based GKRS head frame cannot be used, as it precludes fractionated treatment. OBJECTIVE: To report our experience in treating patients with fractionated GKRS using a relocatable, noninvasive immobilization system...
February 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28535174/probabilistic-multiple-bias-modelling-applied-to-the-canadian-data-from-the-interphone-study-of-mobile-phone-use-and-risk-of-glioma-meningioma-acoustic-neuroma-and-parotid-gland-tumors
#8
F Momoli, J Siemiatycki, M L McBride, M-É Parent, L Richardson, D Bedard, R Platt, M Vrijheid, E Cardis, D Krewski
We undertook a re-analysis of the Canadian data from the thirteen-country INTERPHONE case-control study (2001-2004), which evaluated the association between mobile phone use and risk of brain, acoustic neuroma, and parotid gland tumors. The main publication of the multinational INTERPHONE study concluded that "biases and errors prevent a causal interpretation". We applied a probabilistic multiple-bias model to address possible biases simultaneously, using validation data from billing records and non-participant questionnaires as information on recall error and selective participation...
May 23, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28533656/68ga-dota-d-phe1-tyr3-octreotide-dotatoc-pet-ct-in-a-suspected-case-of-recurrent-meningioma
#9
Sachin Jain, Ashwani Gupta, Anurag Jain
No abstract text is available yet for this article.
April 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28532172/cranio-spinal-rosai-dorfman-disease-case-series-and-literature-review
#10
Shashank S Joshi, Shilpa Joshi, Girish Muzumdar, Keki E Turel, Rajan M Shah, Indoo Ammbulkar, Muhammad Masood Hussain, Kishor A Choudhari
Rosai-Dorfman disease (RDD) is a rare condition similar to lymphomas, presenting with cervical lymphadenopathy in young adults. Extra-nodal involvement is relatively common but involvement of the central nervous system (CNS) is rare. Cranial RDD presents with symptoms of raised intracranial pressure, focal or generalised seizures, while spinal RDD presents with pain, peripheral neurological deficits and radiculopathy. In contrast to other similar neoplastic or degenerative conditions affecting the CNS, RDD is a benign, non-infective, granulomatous disorder...
May 22, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28531342/prognostic-significance-of-preoperative-neutrophilia-on-recurrence-free-survival-in-meningioma
#11
Shirin Karimi, Mana V Vyas, Lior Gonen, Raha Tabasinejad, Quinn Ostrom, Jill Barnholtz-Sloan, Suganth Suppiah, Gelareh Zadeh, Kenneth Aldape
Background: Meningioma is the most common primary intracranial tumor and recurrence is one of the important challenges in patient management. Prognostic factors for tumor recurrences in these patients especially before surgical resection are not fully characterized. Several studies have indicated an association between changes in hematologic laboratory parameters with patient outcomes in solid malignancies. We aimed to assess the association between hematological parameters and tumor recurrence in patients with meningioma...
May 20, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28531331/diagnostic-challenges-in-meningioma
#12
Martha Nowosielski, Nobert Galldiks, Sarah Iglseder, Philipp Kickingereder, Andreas von Deimling, Martin Bendszus, Wolfgang Wick, Felix Sahm
Advances in molecular profiling and the application of advanced imaging techniques are currently refreshing diagnostic considerations in meningioma patients. Not only technical refinements but also sophisticated histopathological and molecular studies have the potential to overcome some of the challenges during meningioma management. Exact tumor delineation, assessment of tumor growth and pathophysiological parameters were recently addressed by "advanced" magnetic resonance imaging and positron emission tomography...
May 20, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28527972/genetic-and-epigenetic-alterations-in-meningiomas
#13
REVIEW
Vasiliki Galani, Evangeli Lampri, Anna Varouktsi, George Alexiou, Antigoni Mitselou, Athanasios P Kyritsis
Meningiomas originate from the arachnoid layer of the meninges and divided histologically into three grades: benign (grade I), atypical (grade II), and malignant meningiomas (grade III). Genetic alterations in grade I meningiomas include frequent deletions of chromosomal locus 22q12 and NF2 gene mutations and uncommon somatic SMARCB1 and SMARCE1gene mutations; In grade II meningiomas, chromosomal losses occur on 1p, 22q, 14q, 18q, 10, and 6q, and gains on 20q, 12q, 15q, 1q, 9q, and 17q; In grade III meningiomas, losses have been recognized on 6q, 10, and 14q and alterations of PTEN, CDKN2A and CDKN2B genes...
May 3, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28527009/the-simpson-grading-in-meningioma-surgery-does-the-tumor-location-influence-the-prognostic-value
#14
Kira Marie Voß, Dorothee Cäcilia Spille, Cristina Sauerland, Eric Suero Molina, Caroline Brokinkel, Werner Paulus, Walter Stummer, Markus Holling, Astrid Jeibmann, Benjamin Brokinkel
In meningiomas, location-specific differences of the prognostic value of the Simpson classification are sparsely investigated but can influence strategy of surgery. We therefore compared the prognostic value of the Simpson classification in different tumor locations. Progression was compared with Simpson grade in 826 meningioma patients (median age 58 years, female:male ratio 2.4) in location-specific uni- and multivariate analyses. Simpson grade strongly correlated with tumor location (p < .001). Within a median follow-up of 50 months, recurrence was observed in 107 of 803 patients (13%)...
May 19, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28526644/simple-tumor-localization-scale-for-estimating-management-outcome-of-intracranial-meningioma
#15
Bruno Splavski, Irina Bagic, Vjenceslav Vrtaric, Brano Splavski
OBJECTIVE: Intracranial meningiomas are typically benign extracerebral tumors derived from dural arachnoid cells. Predominantly, these tumors are effectively managed surgically, but the prognosis is heavily dependent on tumors' histological heterogeneity and its location. It is known that reproductive and hormonal factors increase the risk for meningioma in adult females, but their prognostic value still remains controversial. This study's aim was to examine possible correlation between tumor location and outcome, and to evaluate prognostic value of the proposed simple tumor localization scale in predicting the management outcome of intracranial meningioma...
May 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28524122/-a-plasminogen-regulation-system-in-brain-tumors
#16
O I Kit, E M Frantsiyants, L S Kozlova, E E Rostorguev, I V Balyazin-Parfenov, Yu A Pogorelova
INTRODUCTION: Tumor progression and neovascularization during malignant processes are believed to be associated with plasminogen activators and the PAI-1 inhibitor, but their role and interactions in various types of brain tumors have been studied insufficiently. AIM: To conduct a comparative study of plasminogen regulation in optic nerve sheath meningiomas, glioblastomas, and brain metastases of breast cancer, as well as in perifocal tissues surrounding the tumors...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28521402/imaging-characteristics-and-surgical-treatment-of-invasive-meningioma
#17
Weina Hou, Yongqian Ma, Hongshun Xing, Yuehui Yin
In order to provide an effective way to prevent or substantially delay the recurrence of invasive meningioma, and improve the curative effect of surgical treatment, we collected and analyzed the clinical manifestations, pathological features, preoperative imaging characteristics as well the data obtained during the surgical treatment of invasive meningioma. From February 2014 to February 2016, 59 patients with invasive meningioma were enrolled in this study. Invasive meningioma was confirmed in all patients by operation...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521357/lateral-orbitotomy-approach-for-resection-of-intraosseous-sphenoid-wing-meningioma-3-dimensional-operative-video
#18
Joseph D Chabot, S Tonya Stefko, Juan C Fernandez-Miranda
No abstract text is available yet for this article.
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28521341/multicorridor-endoscopic-endonasal-and-supraorbital-approach-for-orbital-roof-meningioma-3-dimensional-operative-video
#19
Joseph D Chabot, S Tonya Stefko, Carl Snyderman, Juan Carlos Fernandez-Miranda
No abstract text is available yet for this article.
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28521039/rhabdoid-meningioma-grading-and-prognostic-significance-of-this-uncommon-variant
#20
Valeria Barresi, Maria Caffo
No abstract text is available yet for this article.
May 1, 2017: Journal of Neuropathology and Experimental Neurology
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