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Neuroradiology CNS tumours

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40 papers 0 to 25 followers Neuroradiology articles related to central nervous system tumours.
By Sebastian Bravo-Grau Neuroradiology Fellow - Radiologist
https://www.readbyqxmd.com/read/27842677/spinal-diffusion-tensor-tractography-for-differentiation-of-intramedullary-tumor-suspected-lesions
#1
K Egger, M Hohenhaus, V Van Velthoven, S Heil, H Urbach
BACKGROUND AND PURPOSE: Primary MRI diagnosis of spinal intramedullary tumor-suspected lesions can be challenging and often requires spinal biopsy or resection with a substantial risk of neurological deficits. We evaluated whether Diffusion Tensor Imaging (DTI) tractography can facilitate the differential diagnosis. MATERIALS AND METHODS: Twenty-five consecutive patients with an intramedullary tumor-suspected lesion considered for spinal surgery were studied with a Diffusion-weighted multi-shot read out segmented EPI sequence (RESOLVE)...
December 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27726412/predicting-glioblastoma-recurrence-by-early-changes-in-the-apparent-diffusion-coefficient-value-and-signal-intensity-on-flair-images
#2
Peter D Chang, Daniel S Chow, Peter H Yang, Christopher G Filippi, Angela Lignelli
OBJECTIVE: Recurrence of glioblastoma multiforme (GBM) arises from areas of microscopic tumor infiltration that have yet to disrupt the blood-brain barrier. We hypothesize that these microscopic foci of invasion cause subtle variations in the apparent diffusion coefficient (ADC) and FLAIR signal detectable with the use of computational big-data modeling. MATERIALS AND METHODS: Twenty-six patients with native GBM were studied immediately after undergoing gross total tumor resection...
October 11, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27889028/pediatric-brain-tumors-update-imaging-characterization-of-pediatric-brain-tumors-in-the-central-nervous-system-including-findings-on-advanced-mr-imaging-techniques
#3
EDITORIAL
Lara A Brandão
No abstract text is available yet for this article.
February 2017: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/27915104/petroclival-meningiomas-remaining-controversies-in-light-of-minimally-invasive-approaches
#4
REVIEW
Sâmia Yasin Wayhs, Guilherme Alves Lepski, Leonardo Frighetto, Gustavo Rassier Isolan
Surgical resection of petroclival meningiomas remains challenging due to their deep location and relationship to vital neurovascular structures. Although the natural history of these tumors involves a slow course, the incidence of cranial nerve deficits and the extent of tumor resection vary widely in the literature. Some reviews on this topic have been conducted, but data remain fragmentary and based on retrospective case series, which hinders attempts at meta-analysis. Within this context, research into the use of minimally invasive approaches, including in neuroendoscopy, continues to emerge...
November 29, 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/25168701/benign-and-malignant-diseases-of-the-clivus
#5
REVIEW
A Neelakantan, A K Rana
The clivus is a bone of the central skull base formed from the basisphenoid and the basiocciput. During normal ageing, the clival marrow converts from haematopoietic with low-to-intermediate T1 signal to fatty high T1 signal. Low T1 signal in adults is a marker of disease. This review illustrates the main important diseases of the clivus. Chordoma, fibrous dysplasia, myeloma, and metastasis arise within the clivus. Chondrosarcoma, nasopharyngeal carcinoma, invasive pituitary macroadenoma, cholesteatoma, and mucocele can be recognized from attention to adjacent structures...
December 2014: Clinical Radiology
https://www.readbyqxmd.com/read/25956664/intracranial-involvement-by-multiple-myeloma
#6
REVIEW
A Lasocki, S Gangatharan, F Gaillard, S J Harrison
Intracranial involvement is a rare complication of multiple myeloma. It results either from direct extra-osseous spread from adjacent skeletal plasmacytomas or extra-medullary disease via haematogenous dissemination. The imaging appearances are non-specific, and dural, leptomeningeal, and parenchymal involvement can all occur. The purpose of this review is to illustrate the various neuroimaging appearances of this rare entity, focusing on MRI.
August 2015: Clinical Radiology
https://www.readbyqxmd.com/read/27856439/early-stage-glioblastomas-mr-imaging-based-classification-and-imaging-evidence-of-progressive-growth
#7
C H Toh, M Castillo
BACKGROUND AND PURPOSE: The serial imaging changes describing the growth of glioblastomas from small to large tumors are seldom reported. Our aim was to classify the imaging patterns of early-stage glioblastomas and to define the order of appearance of different imaging patterns that occur during the growth of small glioblastomas. MATERIALS AND METHODS: Medical records and preoperative MR imaging studies of patients diagnosed with glioblastoma between 2006 and 2013 were reviewed...
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27831762/in-vivo-magnetic-resonance-imaging-of-cd8-t-lymphocytes-recruiting-to-glioblastoma-in-mice
#8
Anning Li, Yue Wu, Feng Tang, Wei Li, Xiaoyuan Feng, Zhenwei Yao
Noninvasive in vivo tracking of adopted immune cells would help improve immunotherapy on glioblastoma. In this study, the authors tried to track adoptive CD8+ T lymphocytes in an in situ GL261 glioblastoma mouse model with magnetic resonance imaging (MRI). CD8+ T lymphocytes from spleen of preimmunized GL261 glioblastoma mice were labeled with superparamagnetic iron oxide, with polylysine as transfection agent. From Prussian blue staining, the labeling efficiency was 0.77% ± 0.06%, without altering cell viability and function...
November 2016: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/27832430/multisession-gamma-knife-surgery-for-large-brain-metastases
#9
Toshinori Hasegawa, Takenori Kato, Takashi Yamamoto, Hiroshi Iizuka, Tomohide Nishikawa, Hiroshi Ito, Naoki Kato
This study aimed to explore the safety and efficacy of multisession gamma knife surgery (GKS) for large brain metastases with a volume of 10 cm(3) or larger. Fifty-six patients who had 65 brain metastases with a volume of at least 10 cm(3) were treated with multisession GKS. Three-session GKS at a prescription dose of 10 Gy to the tumor margin per session with a 2-week interval between doses was performed in 3 patients. Other patients were treated with 2-session GKS at a prescription dose of 10-13 Gy to the tumor margin per session with an interval of 1-4 weeks...
November 10, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27833409/preoperative-coiling-of-coexisting-intracranial-aneurysm-and-subsequent-brain-tumor-surgery
#10
Keun Young Park, Byung Moon Kim, Dong Joon Kim
OBJECTIVE: Few studies have investigated treatment strategies for brain tumor with a coexisting unruptured intracranial aneurysm (cUIA). The purpose of this study was to evaluate the safety and efficacy of preoperative coiling for cUIA, and subsequent brain tumor surgery. MATERIALS AND METHODS: A total of 19 patients (mean age, 55.2 years; M:F = 4:15) underwent preoperative coiling for 23 cUIAs and subsequent brain tumor surgery. Primary brain tumors were meningiomas (n = 7, 36...
November 2016: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/27802108/release-of-cell-free-microrna-tumor-biomarkers-into-the-blood-circulation-with-pulsed-focused-ultrasound-a-noninvasive-anatomically-localized-molecular-liquid-biopsy
#11
John R Chevillet, Tatiana D Khokhlova, Maria D Giraldez, George R Schade, Frank Starr, Yak-Nam Wang, Emily N Gallichotte, Kai Wang, Joo Ha Hwang, Muneesh Tewari
Purpose To compare the abilities of three pulsed focused ultrasound regimes (that cause tissue liquefaction, permeabilization, or mild heating) to release tumor-derived microRNA into the circulation in vivo and to evaluate release dynamics. Materials and Methods All rat experiments were approved by the University of Washington Institutional Animal Care and Use Committee. Reverse-transcription quantitative polymerase chain reaction array profiling was used to identify candidate microRNA biomarkers in a rat solid tumor cell line...
November 1, 2016: Radiology
https://www.readbyqxmd.com/read/27791524/reoperative-endoscopic-endonasal-surgery-for-residual-or-recurrent-pituitary-adenomas
#12
Hazem M Negm, Rafid Al-Mahfoudh, Manish Pai, Harminder Singh, Salomon Cohen, Sivashanmugam Dhandapani, Vijay K Anand, Theodore H Schwartz
OBJECTIVE Regrowth of the lesion after surgical removal of pituitary adenomas is uncommon unless subtotal resection was originally achieved in the first surgery. Treatment for recurrent tumor can involve surgery or radiotherapy. Locations of residual tumor may vary based on the original approach. The authors evaluated the specific sites of residual or recurrent tumor after different transsphenoidal approaches and describe the surgical outcome of endoscopic endonasal transsphenoidal reoperation. METHODS The authors analyzed a prospectively collected database of a consecutive series of patients who had undergone endoscopic endonasal surgeries for residual or recurrent pituitary adenomas after an original transsphenoidal microscopic or endoscopic surgery...
October 28, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27736650/repeat-surgery-for-recurrent-low-grade-gliomas-should-be-standard-of-care
#13
REVIEW
Tyler J Uppstrom, Ranjodh Singh, Georgios F Hadjigeorgiou, Rajiv Magge, Rohan Ramakrishna
The importance of surgery and maximal extent of resection (EOR) is well established in primary low-grade glioma (LGG) management. However, the role of surgery in the management of recurrent LGG is less clear. A recent review on the management of recurrent LGG concluded there was insufficient evidence to recommend surgery. Here, we summarize the recent advances regarding the role of surgery, radiotherapy (RT) and chemotherapy in the management of recurrent LGG. There is increasing evidence to support maximal EOR for treating recurrent LGG, as it may improve progression free survival (PFS) after recurrence and overall survival (OS)...
December 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27676279/current-management-of-low-grade-gliomas
#14
Andreas F Hottinger, Monika E Hegi, Brigitta G Baumert
PURPOSE OF REVIEW: The management of patients suffering from low-grade gliomas (LGGs) remains a challenge in absence of a definite curative therapy. The median survival is highly variable, from 2 years (high-risk disease) to over 15 years (low risk). The aim of this review is to provide a practical step-by-step evaluation of the available treatment options for patients with LGGs. RECENT FINDINGS: Next to clinical prognostic markers, both the isocitrate dehydrogenase (IDH) mutation status and the status of 1p/19q codeletion are key prognostic factors for the optimal management of patients with LGG...
December 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27708253/unusual-complication-of-pituitary-macroadenoma-a-case-report-and-review
#15
Mohamed Said Abbas, Mohammad Najm AlBerawi, Issam Al Bozom, Nissar F Shaikh, Khalid Yacout Salem
BACKGROUND Pituitary macroadenoma is a common benign tumor that usually presents with visual field defects or hormonal abnormalities. Cerebral infarction can be a complication of a large pituitary adenoma. We report a rare case of bilateral anterior cerebral arteries infarcts by a large pituitary macroadenoma with apoplexy. CASE REPORT A 48-year-old male patient presented with altered conscious level and sudden loss of vision for one-day duration. Magnetic resonance imaging of the brain showed a large seller and suprasellar hemorrhagic mass of pituitary origin, with associated bilateral areas of diffusion restriction in the frontal parasagittal regions, consistent with infarctions...
October 6, 2016: American Journal of Case Reports
https://www.readbyqxmd.com/read/26903229/a-comprehensive-review-of-imaging-findings-in-human-cysticercosis
#16
REVIEW
Bargavee Venkat, Neeti Aggarwal, Sushma Makhaik, Ramgopal Sood
Cysticercosis is a zoonotic disease most commonly affecting brain, eye and muscles, causing significant morbidity. Transmitted by faeco-oral route, this disease was endemic in many developing countries; it is now seen worldwide due to globalisation. Manifestations are produced by the mass effect of the parasite and by the immune response mounted by the host on the parasite. There are myriad clinical features and imaging findings. Radiological features depend on the number, stage and location of the parasite and associated complications...
April 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27138052/variants-of-meningiomas-a-review-of-imaging-findings-and-clinical-features
#17
REVIEW
Akira Kunimatsu, Natsuko Kunimatsu, Kouhei Kamiya, Masaki Katsura, Harushi Mori, Kuni Ohtomo
Meningiomas are common neoplasms that frequently occur in the brain and spine. Among the 15 histological subtypes of meningiomas in the WHO classification, the incidence of meningothelial meningiomas is the highest, followed by fibrous and transitional meningiomas. These three subtypes account for approximately 80 % of all meningiomas, and thus could be regarded as typical meningiomas. For this reason, other uncommon histological subtypes may be considered as imaging variants, and diagnosis is often challenging for radiologists solely based on imaging features of typical meningiomas...
July 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27161065/dynamic-contrast-enhanced-and-dynamic-susceptibility-contrast-perfusion-mr-imaging-for-glioma-grading-preliminary-comparison-of-vessel-compartment-and-permeability-parameters-using-hotspot-and-histogram-analysis
#18
Corrado Santarosa, Antonella Castellano, Gian Marco Conte, Marcello Cadioli, Antonella Iadanza, Maria Rosa Terreni, Alberto Franzin, Lorenzo Bello, Massimo Caulo, Andrea Falini, Nicoletta Anzalone
INTRODUCTION: Dynamic susceptibility contrast (DSC)-MRI is a perfusion technique with high diagnostic accuracy for glioma grading, despite limitations due to inherent susceptibility effects. Dynamic contrast-enhanced (DCE)-MRI has been proposed as an alternative technique able to overcome the DSC-MRI shortcomings. This pilot study aimed at comparing the diagnostic accuracy of DSC and DCE-MRI for glioma grading by evaluating two estimates of blood volume, the DCE-derived plasma volume (Vp) and the DSC-derived relative cerebral blood volume (rCBV), and a measure of vessel permeability, the DCE-derived volume transfer constant K(trans)...
June 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27501887/comparison-between-dynamic-susceptibility-contrast-magnetic-resonance-imaging-and-arterial-spin-labeling-techniques-in-distinguishing-malignant-from-benign-brain-tumors
#19
Emine Sevcan Ata, Mehmet Turgut, Cenk Eraslan, Yelda Özsunar Dayanır
OBJECTIVES: The purpose of this study was to preliminarily compare unenhanced arterial spin-labeled (ASL) imaging, dynamic susceptibility contrast-enhanced cerebral blood volume (DSCE-CBV) magnetic resonance imaging (MRI) for evaluation of tumor perfusion in patients with brain tumors. MATERIALS AND METHODS: A total of 27 patients with brain tumors were examined in 1,5T MRI. Single phase and multiphase ASL, DSCE-CBV examinations were assessed by both qualitative and quantitative analysis for the detection of malignancy...
September 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27561831/improving-the-grading-accuracy-of-astrocytic-neoplasms-noninvasively-by-combining-timing-information-with-cerebral-blood-flow-a-multi-ti-arterial-spin-labeling-mr-imaging-study
#20
S Yang, B Zhao, G Wang, J Xiang, S Xu, Y Liu, P Zhao, J Pfeuffer, T Qian
BACKGROUND AND PURPOSE: Systematic and accurate glioma grading has clinical significance. We present the utility of multi-TI arterial spin-labeling imaging and provide the bolus arrival time maps for grading astrocytomas. MATERIALS AND METHODS: Forty-three patients with astrocytomas (21 men; mean age, 51 years) were recruited. The classification abilities of conventional MR imaging features, normalized CBF value derived from multi-TI arterial spin-labeling imaging, normalized bolus arrival time, and normalized CBF derived from single-TI arterial spin-labeling were compared in patients with World Health Organization (WHO) grade II, III, and IV astrocytomas...
August 25, 2016: AJNR. American Journal of Neuroradiology
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