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Leptomeningeal

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https://www.readbyqxmd.com/read/29346604/unique-genetic-profiles-from-cerebrospinal-fluid-cell-free-dna-in-leptomeningeal-metastases-of-egfr-mutant-non-small-cell-lung-cancer-a-new-medium-of-liquid-biopsy
#1
Y S Li, B Y Jiang, J J Yang, X C Zhang, Z Zhang, J Y Ye, W Z Zhong, H Y Tu, H J Chen, Z Wang, C R Xu, B C Wang, H J Du, S Chuai, H Han-Zhang, J Su, Q Zhou, X N Yang, W B Guo, H H Yan, Y H Liu, L X Yan, B Huang, M M Zheng, Y L Wu
Background: Leptomeningeal metastases (LM) are more frequent in non-small cell lung cancer (NSCLC) with epidermal growth factor receptor (EGFR) mutations. Due to limited access to leptomeningeal lesions, the purpose of this study was to explore the potential role of cerebrospinal fluid (CSF) as a source of liquid biopsy in patients with LM. Patients and methods: Primary tumor, CSF, and plasma in NSCLC with LM were tested by next-generation sequencing. In total, 45 patients with suspected LM underwent lumbar puncture, and those with EGFR mutations diagnosed with LM were enrolled...
January 15, 2018: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29345149/medical-management-of-brain-metastases-and-leptomeningeal-disease-in-patients-with-breast-carcinoma
#2
Kelsey M Bowman, Priya Kumthekar
Breast cancer is the most common malignancy among women and accounts for the second highest number of cancer-related deaths. With patients surviving longer due to advances in systemic control, the incidence of CNS involvement is increasing; however, the management of CNS metastases has not undergone parallel advancements. The blood-brain barrier limits the efficacy of most systemic chemotherapies, and the utilization of surgery and radiation beyond first-line therapy is limited. We will explore the recent developments in the medical management of breast cancer brain metastasis...
January 18, 2018: Future Oncology
https://www.readbyqxmd.com/read/29345035/pressure-and-pipes-from-neuroimaging-to-virtual-measurement
#3
Marialuisa Zedde, Rosario Pascarella
Leng et al. [1] described the practical application of a computational fluid dynamics (CFD) model based on Computed Tomography Angiography (CTA) in 85 patients with symptomatic atherosclerotic M1 middle cerebral artery (MCA) stenosis, to virtually measure arterial pressure (AP) across the stenotic segment, according to the theory that translesional pressure gradient (PG) drives arteriologenesis and leptomeningeal collaterals (LMC) development. This is a fundamental pathophysiological issue about the risk of recurrent stroke downstream an intracranial artery stenosis and both the degree of stenosis and the collateral circulation affect it; in WASID trial [2] patients with severe (> 70%) intracranial stenosis and efficient collaterals had a lower risk of recurrent stroke than patients with poor collaterals...
January 18, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29339320/primary-obstruction-of-the-foramen-of-luschka-anatomy-histology-and-clinical-significance
#4
Laszlo Barany, Gabor Baksa, Patonay Lajos, Gergely Racz, Oliver Ganslandt, Michael Buchfelder, Peter Kurucz
BACKGROUND: The foramen of Luschka is a natural aperture between the fourth ventricle and the subarachnoid space at the cerebellopontine angle (CPA). Membranous closure of this foramen is referred to as primary obstruction. The available information about this variant and its role in the development of the cysts of the posterior fossa are contradictory in the literature. METHODS: Sixty-one formalin-fixed human brains (122 foramina) were involved in this study. Both the macroscopic and the histological features of the obstructed foramina were examined...
January 12, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29339179/primary-diffuse-leptomeningeal-atypical-teratoid-rhabdoid-tumor-diagnosed-by-cerebrospinal-fluid-cytology-case-report-with-molecular-genetic-analysis
#5
Ran Tomomasa, Satoshi Nakata, Sumihito Nobusawa, Keishi Horiguchi, Nozomi Matsumura, Hayato Ikota, Junko Hirato, Yuhei Yoshimoto, Hideaki Yokoo
Atypical teratoid/rhabdoid tumors (AT/RT) are rare malignant neoplasms that mainly affect infants and young children, and are typically located in the cerebellar hemispheres. These tumors are histologically characterized by varying proportions of rhabdoid cells, and nuclear INI1 immunonegativity. Here, we report a case of a 15-year-old male with primary diffuse leptomeningeal AT/RT. The patient had symptoms similar to those of meningitis. Magnetic resonance imaging revealed leptomeningeal thickening. Cytological examination using cerebrospinal fluid was repeatedly performed and revealed rhabdoid cells with loss of INI1 reactivity, and shortly after, the diagnosis of AT/RT was confirmed by tissue biopsy...
January 12, 2018: Human Pathology
https://www.readbyqxmd.com/read/29337049/sphingosine-1-phosphate-receptor-1-activation-enhances-leptomeningeal-collateral-development-and-improves-outcome-after-stroke-in-mice
#6
Eri Iwasawa, Satoru Ishibashi, Motohiro Suzuki, FuYing Li, Masahiko Ichijo, Kazunori Miki, Takanori Yokota
BACKGROUND: Development of collateral circulation after acute ischemic stroke is triggered by shear stress that occurs in pre-existing arterioles. Recently, sphingosine-1-phosphate receptor 1 (S1P1) on endothelial cells was reported to sense shear stress and transduce its signaling pathways. METHODS: BALB/c mice (n = 118) were subjected to permanent middle cerebral artery occlusion (pMCAO) or sham operation. We investigated the effect of an S1P1-selective agonist SEW2871 on leptomeningeal collateral arteries and neurological outcome after pMCAO...
January 11, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29336617/incidental-neuroblastoma-with-bilateral-retinoblastoma-what-are-the-chances
#7
Kelsey Roelofs, Furqan Shaikh, William Astle, Brenda L Gallie, Sameh E Soliman
A child with bilateral familial retinoblastoma underwent staging MRI brain and orbit which identified subtle leptomeningeal enhancement, thus prompting an MRI whole body, which revealed a retroperitoneal mass, confirmed on laparoscopic biopsy to be neuroblastoma. This is the first reported case of these two rare embryonal non-central nervous system tumors occurring concurrently. The cause of this concurrence is unknown despite their pathogenic similarities with a chance of 4 cases per 10 billion children aged 1-4 years...
January 16, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29334442/a-rare-initial-presentation-of-primary-diffuse-leptomeningeal-pnet-in-a-10-year-old-male
#8
Peter Paul Lim, Jagadeesh Ramdas, Michal Ann Miller, Conrad Schuerch, George Wu
Primary leptomeningeal primitive neuroectodermal tumors (PNETs) are extremely rare childhood central nervous system malignancies harboring a very poor prognosis. There is no consensus treatment for these tumors to date. We report a case of a 10-year-old male who presented with mental status change, hydrocephalus, intracranial and spinal diffuse leptomeningeal enhancement without a primary mass upon cranial imaging and a negative initial biopsy until five months into his presentation. He responded significantly well to initial chemotherapy and radiotherapy...
December 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/29329453/response-to-harreld-re-response-assessment-in-medulloblastoma-and-leptomeningeal-seeding-tumors-recommendations-from-the-response-assessment-in-pediatric-neuro-oncology-committee
#9
Katherine E Warren, Gilbert Vezina, Tina Y Poussaint, Monika Warmuth-Metz, Roger J Packer, Mark W Kieran
No abstract text is available yet for this article.
January 10, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29329452/comment-on-response-assessment-in-medulloblastoma-and-leptomeningeal-seeding-tumors-recommendations-from-the-response-assessment-in-pediatric-neuro-oncology-committee
#10
https://www.readbyqxmd.com/read/29325060/pathophysiological-analyses-of-leptomeningeal-heterotopia-using-gyrencephalic-mammals
#11
Naoyuki Matsumoto, Naoki Kobayashi, Natsu Uda, Miwako Hirota, Hiroshi Kawasaki
Leptomeningeal glioneuronal heterotopia (LGH) is a focal malformation of the cerebral cortex and frequently found in patients with thanatophoric dysplasia (TD). The pathophysiological mechanisms underlying LGH formation are still largely unclear because of difficulties in obtaining brain samples from human TD patients. Recently, we established a new animal model for analyzing cortical malformations of human TD by utilizing our genetic manipulation technique for gyrencephalic carnivore ferrets. Here we investigated the pathophysiological mechanisms underlying the formation of LGH using our TD ferrets...
January 8, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29323823/atrioesophageal-fistula-a-rare-complication-of-radiofrequency-ablation
#12
Inbar Saporta, Adithya Chennamadhavuni, Michael J Dolan
75-year-old woman was admitted with fever, chills, altered mentation, and right-sided weakness. A month earlier, she had undergone catheter radiofrequency ablation for treatment of chronic atrial fibrillation. A magnetic resonance imaging scan of her brain revealed septic emboli with multiple bilateral cerebral and cerebellar infarcts, as well as extensive bilateral leptomeningeal enhancement. Blood cultures were positive for Streptococcus mitis, Rothia mucilaginosa, Streptococcus pneumonia, and Candida albicans, which suggested a connection between gastrointestinal and cardiovascular systems...
June 2017: WMJ: Official Publication of the State Medical Society of Wisconsin
https://www.readbyqxmd.com/read/29316549/posterior-third-ventricular-glioblastoma-with-primary-leptomeningeal-metastasis-in-a-child
#13
Mustafa Kemal Demir, Ozlem Yapıcıer, Ozden Caglar Ozturk, Melisa Aslan
No abstract text is available yet for this article.
January 10, 2018: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29313091/intradural-cervical-chordoma-with-diffuse-spinal-leptomeningeal-spread-case-report-and-review-of-the-literature
#14
Jing Zhang, Chuan-Ping Gao, Xue-Jun Liu, Wen-Jian Xu
PURPOSE: Chordoma is a low-grade malignant bone tumor derived from embryonic notochord remnants along the axial skeleton. About 50% of chordomas occur in the sacral vertebrae and 35% in the skull base. Most chordomas are extradural and cause extensive bone destruction. Intradural spinal tumors without bone involvement are rare. METHODS: We herein describe the clinical features of a patient with a chordoma as well as the imaging and pathological manifestations of the tumor...
January 8, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29305723/image-guided-ommaya-reservoir-insertion-for-intraventricular-chemotherapy-a-retrospective-series
#15
Jonathan C Lau, Suzanne E Kosteniuk, David R Macdonald, Joseph F Megyesi
BACKGROUND: Ayub Ommaya proposed a surgical technique for subcutaneous reservoir and pump placement in 1963 to allow access to intraventricular cerebrospinal fluid (CSF). Currently, the most common indication for Ommaya reservoir insertion (ORI) in adults is for patients with hematologic or leptomeningeal disorders requiring repeated injection of chemotherapy into the CSF space. Historically, the intraventricular catheter has been inserted blindly based on anatomical landmarks. The purpose of this study was to examine short-term complication rates with ORI with image guidance (IG) and without image guidance (non-IG)...
January 5, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29304362/leptomeningeal-metastases-in-non-small-cell-lung-cancer
#16
REVIEW
Haiying Cheng, Roman Perez-Soler
Leptomeningeal metastasis is a complication of advanced non-small-cell lung cancer (NSCLC). Diagnosis and monitoring of leptomeningeal metastasis are challenging, and are based on neurological, radiographic, and cerebrospinal fluid findings. Substantial progress has been made in several key aspects of management of leptomeningeal metastasis, including improved characterisation of the genetic profiles, generation of clinically relevant animal models, advances in cerebrospinal fluid liquid biopsy with improved cytology and genotyping analysis, and the development of therapeutic agents with greater CNS penetration...
January 2018: Lancet Oncology
https://www.readbyqxmd.com/read/29301133/diffuse-leptomeningeal-glioneural-tumour-simulating-tuberculous-meningitis-in-a-13-year-old-girl
#17
Antonio Guillén Quesada, Patricia Puerta Roldán, Andrés Morales la Madrid, Mariona Suñol, Cristina Jou, Jordi Muchart Lopez, Enrique Ferrer Rodriguez
No abstract text is available yet for this article.
January 5, 2018: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29284657/clinical-reasoning-a-49-year-old-man-with-progressive-numbness-weakness-and-evidence-of-leptomeningeal-enhancement
#18
Alexandra Lovett, Kathleen McKee, Sashank Prasad
No abstract text is available yet for this article.
January 2, 2018: Neurology
https://www.readbyqxmd.com/read/29284603/cerebrovascular-manifestations-of-neurosarcoidosis-an-underrecognized-aspect-of-the-imaging-spectrum
#19
REVIEW
G Bathla, P Watal, S Gupta, P Nagpal, S Mohan, T Moritani
Involvement of the central nervous system by sarcoidosis, also referred to as neurosarcoidosis, is seen clinically in about 5% of patients with systemic disease. CNS involvement most frequently affects the leptomeninges and cranial nerves, though the ventricular system, brain parenchyma, and pachymeninges may also be involved. Even though the involvement of the intracranial vascular structures is well-known on postmortem studies, there is scant literature on imaging manifestations secondary to the vessel wall involvement, being confined mostly to isolated case reports and small series...
December 28, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29282332/collateral-response-modulates-the-time-penumbra-relationship-in-proximal-arterial-occlusions
#20
Smriti Agarwal, Andrew Bivard, Elizabeth Warburton, Mark Parsons, Christopher Levi
OBJECTIVE: While clinical benefit from thrombolysis decreases with increase in time from stroke onset, the relationship of acute physiologic tissue compartments and collateral response to stroke onset time remains unclear. METHODS: We studied consecutive patients with proximal arterial occlusions (n = 355) with whole-brain perfusion CT with CT angiography within 6 hours of stroke onset. Penumbra and core were defined using voxel-based thresholds. Tissue mismatch was defined as the ratio of penumbra to core...
December 27, 2017: Neurology
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