Abstract:
PURPOSE:The purpose of our study was to determine the statistical significance of thresholds of relative cerebral blood volume (rCBV), apparent diffusion coefficient (ADC) and ADC ratios in grading cerebral gliomas. MATERIALS AND METHODS:In this retrospective study, 51 patients with histopathologically confirmed primary cerebral gliomas who had undergone conventional MR imaging, dynamic contrast-enhanced T2*-weighted perfusion MR imaging and diffusion MR imaging were included. A retrospective blinded analysis of the imaging findings including the perfusion and diffusion parameters was done. The rCBV measurements were obtained from regions of maximum perfusion. Minimum ADC values were obtained from the region of maximum hypointensity within the tumor and from the corresponding opposite white matter. Tumor grade determined with the two methods were then compared with the histopathologic grade. Mann-Whitney tests were performed to compare the DWI and PWI between tumor types. Receiver operating characteristic analyses were performed to determine optimum thresholds for tumor grading and also to calculate the sensitivity, specificity, PPV, and NPV for identifying high-grade gliomas. RESULTS:Statistical analysis demonstrated a threshold value of 2.91 for rCBV to provide sensitivity, specificity, PPV, and NPV of 94.7, 93.75, 90.0, and 96.8%, respectively, in determining high-grade gliomas. An ADC value of 98.50 mm(2)/s was defined as a threshold below which tumors were classified as high-grade gliomas and a sensitivity, specificity, PPV, and NPV of 90, 87.1, 81.81 and 93.10% respectively, were obtained. Significant differences were noted in the rCBV ratios, ADC and ADC ratios between low- and high-grade gliomas (P < 0.0001). CONCLUSION:Combining PWI and DWI with conventional MR imaging increases the accuracy of pre-operative imaging grading of glial neoplasms. The rCBV measurements had the most superior diagnostic performance in predicting glioma grade. Absolute ADC values or ADC ratios were also helpful in preoperative grading of gliomas. Threshold values can be used in a clinical setting to evaluate tumors preoperatively for histologic grade and provide a means for guiding treatment and predicting postoperative patient outcome.
journal_name
J Neurooncoljournal_title
Journal of neuro-oncologyauthors
Arvinda HR,Kesavadas C,Sarma PS,Thomas B,Radhakrishnan VV,Gupta AK,Kapilamoorthy TR,Nair Sdoi
10.1007/s11060-009-9807-6subject
Has Abstractpub_date
2009-08-01 00:00:00pages
87-96issue
1eissn
0167-594Xissn
1573-7373journal_volume
94pub_type
杂志文章,收录出版abstract::Leiomyosarcoma has recently been identified as an AIDS-related tumor, usually occurring in children in the chest or abdomen. We describe a case of intracranial leiomyosarcoma in an adult with AIDS. An enhancing mass adjacent to the right occipital cortical surface was diagnosed during a work-up for left arm weakness. ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1006167629968
更新日期:1998-11-01 00:00:00
abstract::Our previous investigations correlated the degree of cytogenetic and immunophenotypic heterogeneity of cultured normal glia, astrocytomas and malignant gliomas. The possible significance was suggested by the statistical correlation of individual antigens with diagnosis and patient survival. The present study has estab...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF02341157
更新日期:1990-12-01 00:00:00
abstract::The p21WAF1/Cip1 (p21) protein, a negative regulator of G1 checkpoint control, was overexpressed in the majority of human gliomas. To investigate whether p21 expression in brain metastases from various systemic origins is similar to that in gliomas and whether p21 expression is regulated differently in brain metastase...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1005972808311
更新日期:1998-05-01 00:00:00
abstract::Identification of patients suffering from elevated psychosocial distress, the sources of the distress, and the necessary treatment of the distress can be rather difficult within the neurosurgical setting (e.g., lack of time, cognitive or aphasic disorders of the patients). The distress thermometer (DT) is a single-ite...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-010-0501-5
更新日期:2011-08-01 00:00:00
abstract:BACKGROUND:Paclitaxel-induced peripheral neuropathy (PN) may be severe and dose-limiting at initial doses > or = 275 mg/M2, but its neurotoxicity at doses < or = 250 mg/M2 has been incompletely characterized. The purposes of this study were to characterize and quantify paclitaxel-induced PN and to determine the utility...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1023/a:1005805907311
更新日期:1997-10-01 00:00:00
abstract::A prospective pilot study was performed in order to assess the safety of treating recurrent malignant gliomas (MGs) with locally infused autologous tumor infiltrating lymphocytes (TILs) and recombinant interleukin-2 (rIL-2). Six patients were entered between June 27, 1994 and June 2, 1995 and followed until July 1, 19...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1023/a:1006293606710
更新日期:1999-01-01 00:00:00
abstract::Stereotactic radiosurgery is a frequently performed procedure for patients with benign intracranial tumors. Benign tumors are good candidates for radiosurgery because they are generally non-invasive, are well visualized by magnetic resonance imaging, and their slow rate of proliferation makes conventional radiation do...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-009-9831-6
更新日期:2009-05-01 00:00:00
abstract::Following surgical resection for brain metastases, fractionated stereotactic radiotherapy (FSRT) has been used as an alternative to single dose treatment for large cavities and to reduce risks of late toxicity. The purpose of this study was to evaluate the outcomes of patients treated with FSRT to the post-operative b...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-014-1417-2
更新日期:2014-05-01 00:00:00
abstract::Thirty-five adult recurrent GBM patients, divided randomly in two groups of 19 and 16 cases, had been treated with two regimens of chemotherapy: a) 'eight-drugs-in-one-day'; b) procarbazine + CCNU + vincristine (PCV) respectively. Chemotherapy was planned at the tumour relapse and delivered as long as tolerated withou...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00172666
更新日期:1992-02-01 00:00:00
abstract::Once considered a "no man's land" especially when invaded by a diffuse low grade glioma (DLGG), the insula remains to this day a surgical challenge. Surgery for insular DLGG involves consideration of its hidden location under the potentially eloquent operculae, the proximity to vascular tree and high density of functi...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-016-2120-2
更新日期:2016-11-01 00:00:00
abstract::We report the case of a 58 year old woman with an epidermoid cyst of the right cerebello-pontine angle that was subtotally excised. She recurred 2 years later and received radiotherapy with resolution of symptoms and shrinkage of the cyst. The natural history of epidermoid cysts and the role of radiotherapy in their m...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF01052846
更新日期:1995-01-01 00:00:00
abstract::This paper presents a study of the effects of scanning parameters variability when assessing glioma sizes on MRI. A database of lesions of various shapes and sizes, segmented on 3D-SPGR MRI images, was acquired on 65 patients with low-grade glioma. Simulations of large slice thickness and patient's head rotation were ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-013-1051-4
更新日期:2013-04-01 00:00:00
abstract:PURPOSE:To evaluate the hypothesis that adults with partially resected (PR<50% resection) supratentorial low-grade glioma (LGG) benefit from higher doses of radiation. METHODS:Patients receiving post-operative radiation for WHO grade I-II LGG at the University of Western Ontario between 1979 and 2001 were studied. Pat...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-006-9141-1
更新日期:2007-04-01 00:00:00
abstract::In 2007 the WHO Classification of Tumours of the Central Nervous System introduced the entity "glioblastoma with oligodendroglioma component" (GBM/OLIGO). This entity accounts for approximately one in every ten new glioblastomas (GBM). In practice, those mixed gliomas with necrosis which were previously diagnosed as a...
journal_title:Journal of neuro-oncology
pub_type: 评论,杂志文章
doi:10.1007/s11060-010-0523-z
更新日期:2011-09-01 00:00:00
abstract::The purpose of this study is to characterize the time course of N-isopropyl-p-[123I]-iodoamphetamine (123I-IMP) uptake of primary central nervous system lymphomas (PCNSL) comparing with those of other common brain tumors such as malignant gliomas and meningioma. Ten patients with PCNSL, 14 with malignant gliomas and 7...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1023/a:1022583610812
更新日期:2003-02-01 00:00:00
abstract::Glioblastomas are aggressive brain tumors that frequently recur in the subventricular zone (SVZ) despite maximal treatment. The purpose of this study was to evaluate imaging patterns of subventricular progression and impact of recurrent subventricular tumor involvement and radiation dose to patient outcome. Retrospect...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-018-2822-8
更新日期:2018-07-01 00:00:00
abstract::Ependymomas are glial neoplasms originating from the wall of the ventricles or from the spinal canal. The significance of histopathological features in accurately predicting biological behavior is still debated. Moreover, key molecular events in the pathogenesis of ependymoma are yet to be defined. The main objective ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-009-0039-6
更新日期:2010-05-01 00:00:00
abstract::Medulloblastoma is a rare malignancy in adults, accounting for approximately 1% of all primary brain tumors. Extraneural metastases have been reported in 10-30% of cases and most commonly involve bone; rarely lymph nodes, visceral organs and bone marrow may be involved with disease. We report here our experience with ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-005-9087-8
更新日期:2006-06-01 00:00:00
abstract:PURPOSE:Because raised matrix metalloprotease (MMP) levels are associated with glioma invasion and angiogenesis, we tested the efficacy of marimastat (MT) an orally active drug that can reduce MMP levels, in patients with gliomas. PATIENTS AND METHODS:A total of 162 patients with intracranial glioblastoma multiforme o...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1007/s11060-005-9098-5
更新日期:2006-07-01 00:00:00
abstract::We report a single-center experience of 16 immunocompetent patients diagnosed with primary central nervous system lymphoma and treated with monochemotherapy with high-dose methotrexate (MTX) and deferred radiotherapy. MTX was given at a dose of 8.0 g/m2 for induction and at a dose of 3.5-8.0 g/m2 for maintenance. Ther...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1007/s11060-008-9736-9
更新日期:2009-03-01 00:00:00
abstract::Treatment of infant hypothalamic chiasmatic glioma (iCHG) is challenging, about 30% of the children progress during chemotherapy. Despite subsequent treatments the 5 year overall-survival rate is only 70%. This study investigates treatment strategies currently applied for progressive iCHG. A web-based questionnaire wa...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-017-2630-6
更新日期:2018-01-01 00:00:00
abstract::We previously showed that inhibition of the platelet-derived growth factor receptor (PDGFR) blocks the survival and migration of medulloblastoma cells. Identification of in vitro PDGFR-targeting pharmacologic agents that are suitable for preclinical testing in medulloblastoma models in vivo will be critical for effici...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-010-0259-9
更新日期:2011-01-01 00:00:00
abstract::While stereotactic radiosurgery (SRS) has been shown effective in the management of brain metastases, small brain metastases (≤10 mm) can pose unique challenges. Our aim was to investigate the efficacy of SRS in the treatment of small brain metastases, as well as elucidate clinically relevant factors impacting local f...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-017-2519-4
更新日期:2017-09-01 00:00:00
abstract::Approximately half of surgically-treated patients with low-grade-glioma (LGG) suffer recurrence or metastasis. Currently there is no effective drug treatment. While the selective COX-2 inhibitor celecoxib showed anti-neoplastic activity against several malignant tumors, its effects against LGG remain to be elucidated....
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-017-2380-5
更新日期:2017-04-01 00:00:00
abstract::The aim of this study was to assess the effectiveness of adding viral vector-mediated gene therapy with herpes simplex virus thymidine kinase (HSV-tk) to standard treatment, in comparison with standard treatment alone to treat patients with high-grade gliomas (HGGs). A literature search of the databases PubMed, Embase...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,meta分析,评审
doi:10.1007/s11060-014-1444-z
更新日期:2014-06-01 00:00:00
abstract::The human glioma cell line, NP-1, expresses IL-8 mRNA and constitutively secretes IL-8 protein. Administration of recombinant IL-8 increased the proliferation of NP-1 cells in a dose-dependent manner. In the presence of anti-IL-8 antiserum, the IL-8 mediated proliferation of NP-1 cell growth was inhibited. Further, NP...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF01054723
更新日期:1995-01-01 00:00:00
abstract::Glioblastoma multiforme is a primary brain tumor associated with extensive invasion into surrounding brain tissue. Matrix metalloproteinases (MMPs) and urokinase plasminogen activation (uPA) system are shown to be involved in tumor invasion as they help in degradation of extracellular matrix (ECM) proteins and thus as...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-006-9126-0
更新日期:2006-09-01 00:00:00
abstract::When SK-N-BE(2) human neuroblastoma cells were exposed for 1h to growth medium supplemented with [14C]arachidonic acid (AA) at final concentrations ranging from 1 microM to 100 microM, an amount of this fatty acid was uptaken ranging form a 2% to a 120% of that present in cells at steady state. As more [14C]AA was upt...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1005714320865
更新日期:1997-01-01 00:00:00
abstract::The toxicity of IL-2 and/or C. Parvum when injected directly into the mouse brain was examined by survival and histopathology using different numbers of injections, different doses of IL-2, different solvents for the IL-2, and different doses and routes of administration of C. Parvum. Two injections was found signific...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00172920
更新日期:1989-09-01 00:00:00
abstract::Rapid first pass uptake of drugs is necessary to increase tissue deposition after intraarterial (IA) injection. Here we tested whether brain tissue deposition of a nanoparticulate liposomal carrier could be enhanced by coordinated manipulation of liposome surface charge and physiological parameters, such as IA injecti...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-014-1584-1
更新日期:2014-12-01 00:00:00