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Contrast Enhancement Patterns in Pediatric Glioblastomas. J Comput Assist Tomogr 2023; 47:115-120. [PMID: 36112052 DOI: 10.1097/rct.0000000000001379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND AND PURPOSE Brain tumors are the most common cause of cancer-related deaths among the pediatric population. Among these, pediatric glioblastomas (GBMs) comprise 2.9% of all central nervous system tumors and have a poor prognosis. The purpose of this study is to determine whether the imaging findings can be a prognostic factor for survival in children with GBMs. MATERIALS AND METHODS The imaging studies and clinical data from 64 pediatric patients with pathology-proven GBMs were evaluated. Contrast enhancement patterns were classified into focal, ring-like, and diffuse, based on preoperative postcontrast T1-weighted magnetic resonance images. We used the Kaplan-Meier method and Cox proportional hazard regression to evaluate the prognostic value of imaging findings. RESULTS Patients with ring-enhanced GBMs who underwent gross total resection or subtotal resection were found to have a significantly shorter progression-free survival ( P = 0.03) comparing with other enhancing and nonenhancing glioblastomas. CONCLUSIONS In this study, we analyzed survival factors in children with pediatric glioblastomas. In the group of patients who underwent gross total resection or subtotal resection, those patients with focal-enhanced GBMs had significantly longer progression-free survival ( P = 0.03) than did those with other types of enhancing GBMs (diffuse and ring-like).
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Carloni A, Bernardini M, Mattei C, De Magistris AV, Llabres-Diaz F, Williams J, Gutierrez-Quintana R, Oevermann A, Schweizer-Gorgas D, Finck C, Masseau I, Lorenzo V, Sabatini A, Contiero B, Specchi S. Can MRI differentiate between ring-enhancing gliomas and intra-axial abscesses? Vet Radiol Ultrasound 2022; 63:563-572. [PMID: 35509117 DOI: 10.1111/vru.13098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 02/05/2022] [Accepted: 02/07/2022] [Indexed: 11/29/2022] Open
Abstract
Gliomas of the brain may appear as expansile ring-enhancing masses in MRI studies, mimicking the appearance of intra-axial abscesses. The aims of this study were to compare the MRI features of ring-enhancing gliomas and intra-axial brain abscesses in dogs and cats and to identify the characteristics that might help differentiate them. For this multicenter, retrospective, and observational study, the inclusion criteria were as follows: (a) a definitive diagnosis of glioma or abscess based on cytological or histopathological examination following CSF collection or surgical biopsy/necropsy, respectively; (b) MRI study performed with a high- or low-field MRI scanner, including a same plane T1W pre- and postcontrast, a T2W and a T2 FLAIR sequence in at least one plane. If available, delayed T1W postcontrast, T2*W GE, DWI/ADC, and SWI sequences were also evaluated. Sixteen patients were diagnosed with ring-enhancing gliomas, and 15 were diagnosed with intra-axial abscesses. A homogenous signal on T1W (P = 0.049) and T2W (P = 0.042) sequences, a T2W (P = 0.005) or T2*W GE (P = 0.046) peripheral hypointense halo, and an even enhancing capsule (P = 0.002) were significantly associated with brain abscesses. A progressive central enhancement on delayed T1W postcontrast sequences was correlated with ring-enhancing gliomas (P = 0.009). The combination of the following features was suggestive of brain abscess: homogeneous T1W or T2W signal intensity, a T2W or T2*W GE peripheral hypointense halo and an evenly enhancing capsule. Central progression of enhancement on delayed T1W postcontrast sequences was suggestive of glioma.
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Affiliation(s)
- Andrea Carloni
- Diagnostic Imaging Department, Veterinary Hospital "I Portoni Rossi" Anicura Italy, Zola Predosa, Bologna, Italy
| | - Marco Bernardini
- Diagnostic Imaging Department, Veterinary Hospital "I Portoni Rossi" Anicura Italy, Zola Predosa, Bologna, Italy.,Department of Animal Medicine, Production and Health, Clinical Section, University of Padua, Padua, Legnaro, Italy
| | - Chiara Mattei
- Diagnostic Imaging Department, Veterinary Hospital "I Portoni Rossi" Anicura Italy, Zola Predosa, Bologna, Italy
| | - Angela Vittoria De Magistris
- Diagnostic Imaging Department, Veterinary Hospital "I Portoni Rossi" Anicura Italy, Zola Predosa, Bologna, Italy
| | | | - Jonathan Williams
- Pathobiology and Population Sciences, Royal Veterinary College, Hatfield, UK
| | - Rodrigo Gutierrez-Quintana
- School of Veterinary Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, UK
| | - Anna Oevermann
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | - Cyrielle Finck
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Montreal, Saint-Hyacinthe, Quebec, Canada
| | - Isabelle Masseau
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Montreal, Saint-Hyacinthe, Quebec, Canada
| | | | | | - Barbara Contiero
- Department of Animal Medicine, Production and Health, Clinical Section, University of Padua, Padua, Legnaro, Italy
| | - Swan Specchi
- Diagnostic Imaging Department, Veterinary Hospital "I Portoni Rossi" Anicura Italy, Zola Predosa, Bologna, Italy
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Campion T, Stoneham S, Al-Busaidi A, Kumar A, Jaunmuktane Z, Brandner S, Kitchen N, Thust S. Diverse imaging features of adolescent glioblastoma. BJR Case Rep 2022; 8:20210207. [PMID: 36177265 PMCID: PMC9499436 DOI: 10.1259/bjrcr.20210207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/01/2021] [Accepted: 12/08/2021] [Indexed: 11/25/2022] Open
Abstract
We highlight an unusual case of multifocal glioblastoma in an adolescent patient, manifesting as four discrete brain lesions, each distinct in appearance. Familiarity with the diverse imaging features of glioblastoma can reduce misdiagnosis and avoid treatment delays.
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Affiliation(s)
- Thomas Campion
- Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, UK
| | - Sara Stoneham
- Teenage and Young Adult Cancer Unit, Department of Paediatric Oncology, University College London Foundation Hospital, London, UK
| | - Ayisha Al-Busaidi
- Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, UK
| | - Atul Kumar
- Division of Neuropathology, National Hospital for Neurology and Neurosurgery, University College London NHS Foundation Trust, London, UK
| | - Zane Jaunmuktane
- Division of Neuropathology, National Hospital for Neurology and Neurosurgery, University College London NHS Foundation Trust, London, UK
- Department of Clinical and Movement Neurosciences and Queen Square Brain Bank for Neurological Disorders, Queen Square Institute of Neurology, University College London, London, UK
| | - Sebastian Brandner
- Division of Neuropathology, National Hospital for Neurology and Neurosurgery, University College London NHS Foundation Trust, London, UK
- Department of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK
| | - Neil Kitchen
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
| | - Stefanie Thust
- Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, UK
- Neuroradiology Academic Unit, Department of Brain, Repair and Rehabilitation, UCL Institute of Neurology, London, UK
- Imaging Department, University College London Foundation Hospital, London, UK
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Hu WZ, Guo F, Xu YQ, Xi YB, He B, Yin H, Kang XW. Differentiation of Neoplastic and Non-neoplastic Intracranial Enhancement Lesions Using Three-Dimensional Pseudo-Continuous Arterial Spin Labeling. Front Neurosci 2022; 16:812997. [PMID: 35299623 PMCID: PMC8923048 DOI: 10.3389/fnins.2022.812997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/17/2022] [Indexed: 11/13/2022] Open
Abstract
Background and Purpose It is sometimes difficult to effectively distinguish non-neoplastic from neoplastic intracranial enhancement lesions using conventional magnetic resonance imaging (MRI). This study aimed to evaluate the diagnostic performance of three-dimensional pseudo-continuous arterial spin labeling (3D-pCASL) to differentiate non-neoplastic from neoplastic enhancement lesions intracranially. Materials and Methods This prospective study included thirty-five patients with high-grade gliomas (HGG), twelve patients with brain metastasis, and fifteen non-neoplastic patients who underwent conventional, contrast enhancement and 3D-pCASL imaging at 3.0-T MR; all lesions were significantly enhanced. Quantitative parameters including cerebral blood flow (CBF) and relative cerebral blood flow (rCBF) were compared between neoplastic and non-neoplastic using Student’s t-test. In addition, the area under the receiver operating characteristic (ROC) curve (AUC) was measured to assess the differentiation diagnostic performance of each parameter. Results The non-neoplastic group demonstrated significantly lower rCBF values of lesions and perilesional edema compared with the neoplastic group. For the ROC analysis, both relative cerebral blood flow of lesion (rCBF-L) and relative cerebral blood flow of perilesional edema (rCBF-PE) had good diagnostic performance for discriminating non-neoplastic from neoplastic lesions, with an AUC of 0.994 and 0.846, respectively. Conclusion 3D-pCASL may contribute to differentiation of non-neoplastic from neoplastic lesions.
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Affiliation(s)
- Wen-zhong Hu
- Department of Radiology, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
- Department of Radiology, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
| | - Fan Guo
- Department of Radiology, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
| | - Yong-qiang Xu
- Department of Radiology, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
| | - Yi-bin Xi
- Department of Radiology, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
| | - Bei He
- Department of Radiology, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
| | - Hong Yin
- Department of Radiology, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
- Department of Radiology, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
- *Correspondence: Hong Yin,
| | - Xiao-wei Kang
- Department of Radiology, Xi’an People’s Hospital, Xi’an Fourth Hospital, Xi’an, China
- *Correspondence: Hong Yin,
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Zeng T, Xu Z, Yan J. The value of asphericity derived from T1-weighted MR in differentiating intraparenchymal ring-enhancing lesions-comparison of glioblastomas and brain abscesses. Neurol Sci 2021; 42:5171-5175. [PMID: 33796946 DOI: 10.1007/s10072-021-05226-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/25/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Both brain abscess(BA)and glioblastoma (GBM) are common causative pathologies of intraparenchymal ring-enhancing lesions. Advanced MR sequences such as diffusion weighted image (DWI) were often used to increase distinguishability of both entities. PURPOSE To evaluate the value of asphericity (ASP) from conventional T1-weighted MR images in differentiating BA from morphologically similar ring-enhancing GBM. MATERIAL AND METHODS Twenty-one BA and twenty-nine GBM were retrospectively included in this study. Each region of interest (ROI) was delineated twice with the software of ITK-SNAP on the contrast-enhanced T1 images by two observers. ASP was calculated to define the relative deviation of the ROI's shape from a sphere. Intraclass correlation coefficients (ICC) for inter-observer and intra-observer were calculated. The diagnostic capabilities of ASP and conventional volume (VOL) of ROI were evaluated with receiver operating characteristic (ROC) curve analysis. In addition, areas under the ROC curves of ASP and VOL were compared. RESULTS ICC of intra-observer and inter-observer were 0.99 (95% confidence interval, [CI] 0.97-0.99) and 0.98 (0.95-0.99), respectively. Both ASP and VOL showed significant difference between BA and GBM. The mean ASP values for BA and GBM were 66.3±7.8 and 14.7±1.8, respectively. The mean VOL value of BA was also larger than that of GBM (47.2±7.4 vs. 20.7±1.5 mm3). The mean AUC of ASP and VOL were 0.977 (95% CI 0.944-1) and 0.86 (95% CI 0.746-0.974), respectively. The AUC of ASP was significantly higher than that of VOL (p=0.04). The optimal cut point values of ASP and VOL were 24.39 and 24.86 mm3, respectively. CONCLUSIONS ASP derived from routine MRI is useful in differentiating BA from GBM.
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Affiliation(s)
- Tao Zeng
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Middle Yanchang Road, Shanghai, 200072, China
| | - Zijun Xu
- Department of Radiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Middle Yanchang Road, Shanghai, 200072, China
| | - Jianhua Yan
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai, 201318, China. .,Molecular Imaging Precision Medicine Collaborative Innovation Center, Shanxi Medical University, Taiyuan, 030001, Shanxi, China.
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Ventricle-predominant primary CNS lymphomas: clinical, radiological and pathological evaluation of five cases and review of the literature. Brain Tumor Pathol 2019; 37:22-30. [DOI: 10.1007/s10014-019-00354-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 10/04/2019] [Indexed: 12/11/2022]
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Comparison between MRI-derived ADC maps and 18FLT-PET in pre-operative glioblastoma. J Neuroradiol 2019; 46:359-366. [PMID: 31229576 DOI: 10.1016/j.neurad.2019.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 05/02/2019] [Accepted: 05/23/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND PURPOSE Among principal MRI sequences used for a better pre-therapeutic characterization of glioblastoma (GBM), DWI-derived ADC is expected to be a good parameter for the evaluation of cellularity, due to restricted water diffusivity. We aimed here to compare ADC maps to 18FLT-PET, a proliferation tracer, in GBM cases. MATERIALS AND METHODS Patients underwent 18FLT-PET, followed by multiparametric magnetic resonance imaging (MRI) just prior to surgery. We analysed in this study twenty GBM confirmed patients. The 5th percentile (5p) of the ADC values were thresholded to define the ADCmin ROI, while the 95th percentile (95p) of the SUV FLT values were used to define the FLTmax ROI. The statistical and spatial correlations between these two groups of ROIs were analyzed. RESULTS We did not observe any significant correlations between ADCmin and FLTmax cut-off values (R2=0.0285), neither between ADCmin and FLTmax ROIs (mean Dice=0.09±0.12). Mean ADC values in the FLTmax defined ROI were significantly higher than the values in the ADCmin ROI (P<0.001). Mean FLT values in the FLTmax ROI were significantly higher than the values in the ADCmin ROI (P<0.001). CONCLUSIONS When comparing ADC maps to 18FLT uptake, we did not observe significant anatomical overlap nor correlation, between the regions of low ADC and high FLT disabling to clearly link ADC values to cellular proliferation. The exact significance of ADC maps in GBM has yet to be elaborated.
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Swinburne NC, Schefflein J, Sakai Y, Oermann EK, Titano JJ, Chen I, Tadayon S, Aggarwal A, Doshi A, Nael K. Machine learning for semi-automated classification of glioblastoma, brain metastasis and central nervous system lymphoma using magnetic resonance advanced imaging. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:232. [PMID: 31317002 DOI: 10.21037/atm.2018.08.05] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Differentiating glioblastoma, brain metastasis, and central nervous system lymphoma (CNSL) on conventional magnetic resonance imaging (MRI) can present a diagnostic dilemma due to the potential for overlapping imaging features. We investigate whether machine learning evaluation of multimodal MRI can reliably differentiate these entities. Methods Preoperative brain MRI including diffusion weighted imaging (DWI), dynamic contrast enhanced (DCE), and dynamic susceptibility contrast (DSC) perfusion in patients with glioblastoma, lymphoma, or metastasis were retrospectively reviewed. Perfusion maps (rCBV, rCBF), permeability maps (K-trans, Kep, Vp, Ve), ADC, T1C+ and T2/FLAIR images were coregistered and two separate volumes of interest (VOIs) were obtained from the enhancing tumor and non-enhancing T2 hyperintense (NET2) regions. The tumor volumes obtained from these VOIs were utilized for supervised training of support vector classifier (SVC) and multilayer perceptron (MLP) models. Validation of the trained models was performed on unlabeled cases using the leave-one-subject-out method. Head-to-head and multiclass models were created. Accuracies of the multiclass models were compared against two human interpreters reviewing conventional and diffusion-weighted MR images. Results Twenty-six patients enrolled with histopathologically-proven glioblastoma (n=9), metastasis (n=9), and CNS lymphoma (n=8) were included. The trained multiclass ML models discriminated the three pathologic classes with a maximum accuracy of 69.2% accuracy (18 out of 26; kappa 0.540, P=0.01) using an MLP trained with the VpNET2 tumor volumes. Human readers achieved 65.4% (17 out of 26) and 80.8% (21 out of 26) accuracies, respectively. Using the MLP VpNET2 model as a computer-aided diagnosis (CADx) for cases in which the human reviewers disagreed with each other on the diagnosis resulted in correct diagnoses in 5 (19.2%) additional cases. Conclusions Our trained multiclass MLP using VpNET2 can differentiate glioblastoma, brain metastasis, and CNS lymphoma with modest diagnostic accuracy and provides approximately 19% increase in diagnostic yield when added to routine human interpretation.
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Affiliation(s)
| | - Javin Schefflein
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Yu Sakai
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eric Karl Oermann
- Department of Neurological Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Joseph J Titano
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Iris Chen
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Amit Aggarwal
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Amish Doshi
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kambiz Nael
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Lai PH, Chung HW, Chang HC, Fu JH, Wang PC, Hsu SH, Hsu SS, Lin HS, Chuang TC. Susceptibility-weighted imaging provides complementary value to diffusion-weighted imaging in the differentiation between pyogenic brain abscesses, necrotic glioblastomas, and necrotic metastatic brain tumors. Eur J Radiol 2019; 117:56-61. [PMID: 31307653 DOI: 10.1016/j.ejrad.2019.05.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/22/2019] [Accepted: 05/28/2019] [Indexed: 11/17/2022]
Abstract
PURPOSE The purpose of this retrospective study was to investigate the differentiation of abscess and necrotic tumors, using susceptibility-weighted imaging (SWI) and apparent diffusion coefficients (ADC) either separated or combined. METHODS Imaging was performed on 26 patients with pyogenic brain abscesses, 31 patients with rim-enhancing glioblastomas, and 21 patients with rim-enhancing metastases. The degree of intralesional susceptibility signal (ILSS) was independently assessed by three observers. Average ADC in the lesion core was calculated. After receiver operating characteristic (ROC) analysis, the area under the ROC curve was compared using three different analytical models (ILSS, ADC, and ILSS-ADC combined) to differentiate abscess from the two rim-enhancing necrotic tumors. RESULTS The ILSS-ADC combined model had greater area under the ROC curves than ILSS or ADC used alone. In this study, the ILSS-ADC combined model showed 100% diagnostic accuracy differentiating abscesses from glioblastoma. The ADC model and the ILSS-ADC combined model performed equally well in distinguishing abscesses from metastases. CONCLUSION It is concluded that SWI and ADC are complementary, and the combination of SWI and ADC may improve results compared with the use of only one model. Validation by an independent cohort is the next necessary step to broaden its applicability in routine clinical settings.
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Affiliation(s)
- Ping-Hong Lai
- Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Hsiao-Wen Chung
- Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
| | - Hing-Chiu Chang
- Department of Diagnostic Radiology, The University of Hong Kong, Hong Kong
| | - Jui-Hsun Fu
- Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Po-Chin Wang
- Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Shuo-Hsiu Hsu
- Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Shu-Shong Hsu
- Department of Neurosurgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Huey-Shyan Lin
- Department of Health-Business Administration, School of Nursing, Fooyin University, Kaohsiung, Taiwan
| | - Tzu-Chao Chuang
- Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
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Cladophialophora bantiana Cerebral Phaeohyphomycosis Complicated by Pulmonary Nocardiosis: A Tale of Two Infections. Case Rep Infect Dis 2019; 2019:4352040. [PMID: 31143481 PMCID: PMC6501261 DOI: 10.1155/2019/4352040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 03/02/2019] [Accepted: 03/26/2019] [Indexed: 02/08/2023] Open
Abstract
Cladophialophora bantiana, a melanized neurotropic fungus, is the most commonly reported agent of cerebral phaeohyphomycosis. We present a case of cerebral phaeohyphomycosis due to C. bantiana with a concomitant Nocardia infection in the lung. The patient was a 64-year-old male who presented with one-week history of productive cough, confusion, and staggering gait. Brain MRI showed multiple enhancing masses, and chest CT demonstrated multifocal consolidation. To confirm diagnosis, brain biopsy was performed that showed Cladophialophora bantiana. Bronchoscopic lung biopsy confirmed infection with Nocardia araoensis. The patient was treated with trimethoprim-sulfamethoxazole, meropenem, voriconazole, and liposomal amphotericin in addition to partial resection of the brain mass. After several weeks in the hospital and deteriorating status with poor prognosis, medical care was withdrawn. Cladophialophora bantiana infection is rare and requires multidisciplinary approach for accurate diagnostic confirmation. Aggressive and long-term treatment with voriconazole along with early neurosurgical intervention may offer an improved chance of survival in these patients.
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White ML, Moore DW, Zhang Y, Mark KD, Greiner TC, Bierman PJ. Primary central nervous system post-transplant lymphoproliferative disorders: the spectrum of imaging appearances and differential. Insights Imaging 2019; 10:46. [PMID: 30972513 PMCID: PMC6458224 DOI: 10.1186/s13244-019-0726-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/25/2019] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Central nervous system post-transplant lymphoproliferative disorder (CNS-PTLD) is a rare disease that presents with non-specific signs and symptoms. The purpose of this article is to present the imaging appearances of CNS-PTLD by magnetic resonance imaging. We highlight the differential diagnostic considerations including primary central nervous system lymphoma, glioblastoma, cerebral abscess, and metastatic disease. This is an important topic to review since in daily practice the diagnosis of CNS-PTLD is often not initially considered when present due to its rarity and the lack of radiologists' familiarity with the disease. CONCLUSION Knowing the unique imaging features of CNS-PTLD narrows the differential diagnosis, facilitates the diagnostic work-up, and optimizes making the diagnosis. Advanced MRI data for CNS PTLD is limited but is promising for helping with narrowing the differential diagnosis.
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Affiliation(s)
- Matthew L White
- Radiology, University of Nebraska Medical Center, 981045 Nebraska Medical Center, Omaha, NE, 68198-1045, USA.
| | - Drew W Moore
- Radiology, University of Nebraska Medical Center, 981045 Nebraska Medical Center, Omaha, NE, 68198-1045, USA
| | - Yan Zhang
- Radiology, University of Nebraska Medical Center, 981045 Nebraska Medical Center, Omaha, NE, 68198-1045, USA
| | - Keiper D Mark
- Radiology, University of Nebraska Medical Center, 981045 Nebraska Medical Center, Omaha, NE, 68198-1045, USA
| | - Timothy C Greiner
- Pathology, University of Nebraska Medical Center, 983135 Nebraska Medical Center, Omaha, NE, 68198-3135, USA
| | - Philip J Bierman
- Oncology, University of Nebraska Medical Center, 986840 Nebraska Medical Center, Omaha, NE, 68198-6840, USA
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Sood V, Pattanashetti N, Gupta S, Rudramurthy SM, Ramachandran R, Gupta K. Multiple cerebral abscesses in a renal transplant recipient: Two swords in one scabbard! Med Mycol Case Rep 2019; 23:50-52. [PMID: 30619684 PMCID: PMC6312856 DOI: 10.1016/j.mmcr.2018.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/15/2018] [Accepted: 12/20/2018] [Indexed: 11/21/2022] Open
Abstract
Although rare, both Cladophialophora bantiana (C. bantiana) and Toxoplasma gondii have been known to be associated with brain abscess in renal transplant recipients (RTRs), however co-infection has never been reported till date. In the present case, 40 years old renal transplant recipient on curtailed immunosuppressive therapy presented with progressive headache and altered sensorium. The computed tomography of head showed multiple ring-enhancing discrete lesions in the left frontal lobe, with moderate perilesional oedema. Left frontal craniotomy and aspiration revealed thick yellowish brown pus, which on culture showed the growth of dematiaceous fungal hyphae “C. bantiana” and co-infection with “Toxoplasma” was confirmed by PCR as well as serology (both IgM and IgG – Toxoplasma) positivity. Stereotactic aspiration/open craniotomy and drainage is imperative to arrive at microbiological diagnosis and provide timely therapy to the patient.
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Affiliation(s)
- Vivek Sood
- Department of Nephrology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Navin Pattanashetti
- Department of Nephrology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Shefali Gupta
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Shivprakash M. Rudramurthy
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - Raja Ramachandran
- Department of Nephrology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
| | - K.L. Gupta
- Department of Nephrology, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India
- Corresponding author.
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Differentiation of brain infection from necrotic glioblastoma using combined analysis of diffusion and perfusion MRI. J Magn Reson Imaging 2018; 49:184-194. [DOI: 10.1002/jmri.26053] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/28/2018] [Indexed: 12/13/2022] Open
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Horvath-Rizea D, Surov A, Hoffmann KT, Garnov N, Vörkel C, Kohlhof-Meinecke P, Ganslandt O, Bäzner H, Gihr GA, Kalman M, Henkes E, Henkes H, Schob S. The value of whole lesion ADC histogram profiling to differentiate between morphologically indistinguishable ring enhancing lesions-comparison of glioblastomas and brain abscesses. Oncotarget 2018; 9:18148-18159. [PMID: 29719596 PMCID: PMC5915063 DOI: 10.18632/oncotarget.24454] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 01/30/2018] [Indexed: 12/17/2022] Open
Abstract
Background Morphologically similar appearing ring enhancing lesions in the brain parenchyma can be caused by a number of distinct pathologies, however, they consistently represent life-threatening conditions. The two most frequently encountered diseases manifesting as such are glioblastoma multiforme (GBM) and brain abscess (BA), each requiring disparate therapeutical approaches. As a result of their morphological resemblance, essential treatment might be significantly delayed or even ommited, in case results of conventional imaging remain inconclusive. Therefore, our study aimed to investigate, whether ADC histogram profiling reliably can distinguish between both entities, thus enhancing the differential diagnostic process and preventing treatment failure in this highly critical context. Methods 103 patients (51 BA, 52 GBM) with histopathologically confirmed diagnosis were enrolled. Pretreatment diffusion weighted imaging (DWI) was obtained in a 1.5T system using b values of 0, 500, and 1000 s/mm2. Whole lesion ADC volumes were analyzed using a histogram-based approach. Statistical analysis was performed using SPSS version 23. Results All investigated parameters were statistically different in comparison of both groups. Most importantly, ADCp10 was able to differentiate reliably between BA and GBM with excellent accuracy (0.948) using a cutpoint value of 70 × 10−5 mm2 × s−1. Conclusions ADC whole lesion histogram profiling provides a valuable tool to differentiate between morphologically indistinguishable mass lesions. Among the investigated parameters, the 10th percentile of the ADC volume distinguished best between GBM and BA.
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Affiliation(s)
| | - Alexey Surov
- Clinic for Diagnostic and Interventional Radiology, University Hospital Leipzig, Leipzig, Germany
| | - Karl-Titus Hoffmann
- Department for Neuroradiology, University Hospital Leipzig, Leipzig, Germany
| | | | - Cathrin Vörkel
- Clinic for Diagnostic and Interventional Radiology, University Hospital Leipzig, Leipzig, Germany
| | | | - Oliver Ganslandt
- Clinic for Neurosurgery, Katharinenhospital Stuttgart, Stuttgart, Germany
| | - Hansjörg Bäzner
- Clinic for Neurology, Katherinenhospital Stuttgart, Stuttgart, Germany
| | | | - Marcell Kalman
- Clinic for Neuroradiology, Katharinenhospital Stuttgart, Stuttgart, Germany
| | - Elina Henkes
- Clinic for Neuroradiology, Katharinenhospital Stuttgart, Stuttgart, Germany
| | - Hans Henkes
- Clinic for Neuroradiology, Katharinenhospital Stuttgart, Stuttgart, Germany
| | - Stefan Schob
- Department for Neuroradiology, University Hospital Leipzig, Leipzig, Germany
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Differentiating Between Primary Central Nervous System Lymphomas and Glioblastomas: Combined Use of Perfusion-Weighted and Diffusion-Weighted Magnetic Resonance Imaging. World Neurosurg 2018; 112:e1-e6. [DOI: 10.1016/j.wneu.2017.10.141] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 10/24/2017] [Accepted: 10/25/2017] [Indexed: 02/06/2023]
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Abstract
Magnetic resonance imaging (MRI) is the cornerstone for evaluating patients with brain masses such as primary and metastatic tumors. Important challenges in effectively detecting and diagnosing brain metastases and in accurately characterizing their subsequent response to treatment remain. These difficulties include discriminating metastases from potential mimics such as primary brain tumors and infection, detecting small metastases, and differentiating treatment response from tumor recurrence and progression. Optimal patient management could be benefited by improved and well-validated prognostic and predictive imaging markers, as well as early response markers to identify successful treatment prior to changes in tumor size. To address these fundamental needs, newer MRI techniques including diffusion and perfusion imaging, MR spectroscopy, and positron emission tomography (PET) tracers beyond traditionally used 18-fluorodeoxyglucose are the subject of extensive ongoing investigations, with several promising avenues of added value already identified. These newer techniques provide a wealth of physiologic and metabolic information that may supplement standard MR evaluation, by providing the ability to monitor and characterize cellularity, angiogenesis, perfusion, pH, hypoxia, metabolite concentrations, and other critical features of malignancy. This chapter reviews standard and advanced imaging of brain metastases provided by computed tomography, MRI, and amino acid PET, focusing on potential biomarkers that can serve as problem-solving tools in the clinical management of patients with brain metastases.
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Affiliation(s)
- Whitney B Pope
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, CA, United States.
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Crasto SG, Soffietti R, Rudà R, Cassoni P, Ducati A, Davini O, De Lucchi R, Rizzo L. Diffusion-Weighted Magnetic Resonance Imaging and ADC Maps in the Diagnosis of Intracranial Cystic or Necrotic Lesions. Neuroradiol J 2016; 20:666-75. [DOI: 10.1177/197140090702000611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2007] [Accepted: 07/17/2007] [Indexed: 11/17/2022] Open
Abstract
This study evaluated the usefulness of diffusion-weighted (DW) magnetic resonance imaging (MRI) and ADC maps in the differential diagnosis of brain abscesses from cystic or necrotic neoplasms. MR images of 49 patients with 54 lesions were examined retrospectively. All patients underwent conventional MRI and DWI, and ADC values were calculated by placing ROIs of 30 mm2 manually over the cystic part of the lesions. On DWI, all cystic portions of abscesses were hyperintense. Mean ADC values were 0.48×10 mm2/s (range 0.41–0.54×10 mm/s) for pyogenic abscesses, 0.73×10 mm2/s (range 0.65–0.91×10 mm/s) for mycotic abscesses and 0.6 mm2/s for Nocardia abscess. Cystic areas appeared hypointense on DWI in 33/44 tumours (mean value ADC 1.96 mm2/s). Eleven tumours (11/44) appeared hyperintense on DWI: eight metastases from lung cancer (mean ADC value 0.86 mm2/s, range 0.75–1.2 mm2/s), two GBMs (mean 0.7 mm2/s, range 0.67–0.76 mm2/s) and one anaplastic astrocytoma (ADC value 1.24 mm2/s). ADC values may help in differentiating pyogenic abscess from brain tumors or metastatic lesions.
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Affiliation(s)
- S. Greco Crasto
- Department of Radiology, San Giovanni Battista Hospital; Turin, Italy
| | - R. Soffietti
- Division of Neurooncology, University of Turin; Italy
| | - R. Rudà
- Division of Neurooncology, University of Turin; Italy
| | - P. Cassoni
- Department of Biomedical Sciences and Human Oncology, University of Turin; Italy
| | - A. Ducati
- Neurosurgery, Department of Neurosciences, University of Turin; Italy
| | - O. Davini
- Department of Radiology, San Giovanni Battista Hospital; Turin, Italy
| | - R. De Lucchi
- Department of Radiology, San Giovanni Battista Hospital; Turin, Italy
| | - L. Rizzo
- Department of Radiology, San Luigi Gonzaga, Orbassano, University of Turin; Italy
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Batchelor TT, Chen YB, Rapalino O, Cobos I. CASE RECORDS of the MASSACHUSETTS GENERAL HOSPITAL. Case 23-2015. A 51-Year-Old Woman with Headache, Cognitive Impairment, and Weakness. N Engl J Med 2015. [PMID: 26200983 DOI: 10.1056/nejmcpc1406415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Wang LL, Leach JL, Breneman JC, McPherson CM, Gaskill-Shipley MF. Critical role of imaging in the neurosurgical and radiotherapeutic management of brain tumors. Radiographics 2015; 34:702-21. [PMID: 24819790 DOI: 10.1148/rg.343130156] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Lily L Wang
- From the Departments of Radiology (L.L.W., J.L.L., M.F.G.S.), Radiation Oncology (J.C.B.), and Neurosurgery (C.M.M.), University of Cincinnati College of Medicine, 234 Goodman St, Cincinnati, OH 45267-0761; Brain Tumor Center at the UC Neuroscience Institute and UC Cancer Institute (L.L.W., J.L.L., J.C.B., C.M.M., M.F.G.S.); and Departments of Radiology (J.L.L) and Radiation Oncology (J.C.B.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
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Differentiation of brain abscesses from glioblastomas and metastatic brain tumors: comparisons of diagnostic performance of dynamic susceptibility contrast-enhanced perfusion MR imaging before and after mathematic contrast leakage correction. PLoS One 2014; 9:e109172. [PMID: 25330386 PMCID: PMC4201450 DOI: 10.1371/journal.pone.0109172] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 09/09/2014] [Indexed: 11/21/2022] Open
Abstract
Purpose To compare the diagnostic performance of dynamic susceptibility contrast-enhanced perfusion MRI before and after mathematic contrast leakage correction in differentiating pyogenic brain abscesses from glioblastomas and/or metastatic brain tumors. Materials and Methods Cerebral blood volume (CBV), leakage-corrected CBV and leakage coefficient K2 were measured in enhancing rims, perifocal edema and contralateral normal appearing white matter (NAWM) of 17 abscesses, 19 glioblastomas and 20 metastases, respectively. The CBV and corrected CBV were normalized by dividing the values in the enhancing rims or edema to those of contralateral NAWM. For each study group, a paired t test was used to compare the K2 of the enhancing rims or edema with those of NAWM, as well as between CBV and corrected CBV of the enhancing rims or edema. ANOVA was used to compare CBV, corrected CBV and K2 among three lesion types. The diagnostic performance of CBV and corrected CBV was assessed with receiver operating characteristic (ROC) curve analysis. Results The CBV and correction CBV of enhancing rim were 1.45±1.17 and 1.97±1.01 for abscesses, 3.85±2.19 and 4.39±2.33 for glioblastomas, and 2.39±0.90 and 2.97±0.78 for metastases, respectively. The CBV and corrected CBV in the enhancing rim of abscesses were significantly lower than those of glioblastomas and metastases (P = 0.001 and P = 0.007, respectively). In differentiating abscesses from glioblastomas and metastases, the AUC values of corrected CBV (0.822) were slightly higher than those of CBV (0.792). Conclusions Mathematic leakage correction slightly increases the diagnostic performance of CBV in differentiating pyogenic abscesses from necrotic glioblastomas and cystic metastases. Clinically, DSC perfusion MRI may not need mathematic leakage correction in differentiating abscesses from glioblastomas and/or metastases.
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Artzi M, Bokstein F, Blumenthal DT, Aizenstein O, Liberman G, Corn BW, Ben Bashat D. Differentiation between vasogenic-edema versus tumor-infiltrative area in patients with glioblastoma during bevacizumab therapy: a longitudinal MRI study. Eur J Radiol 2014; 83:1250-1256. [PMID: 24809637 DOI: 10.1016/j.ejrad.2014.03.026] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 03/20/2014] [Accepted: 03/22/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Treatment with bevacizumab is associated with substantial radiologic response in patients with glioblastoma (GB). However, following this initial response, changes in T2-weighted MRI signal may develop, suggesting an infiltrative pattern of tumor progression. The aim of this study was to differentiate between vasogenic-edema versus tumor-infiltrative area in GB patients. METHODS AND MATERIALS Fourteen patients with GB were longitudinally scanned, before and during intravenous bevacizumab therapy (5/10mg/kg every 2-weeks). A total of 40 MR scans including conventional, diffusion, dynamic susceptibility contrast, dynamic contrast enhancement imaging, and MR-spectroscopy (MRS) were analyzed. Classification of non-enhancing fluid-attenuation-inversion-recovery (FLAIR) area was performed based on mean diffusivity, cerebral blood volume and flow maps, and further characterized using multiple MRI parameters. RESULTS The non-enhancing FLAIR lesion area was classified into: vasogenic-edema, characterized by reduced perfusion and increased FLAIR values; or tumor-infiltrative area, characterized by increased perfusion. Tumor-infiltrative area demonstrated a higher malignant pattern on MRS compared to areas of vasogenic-edema. Substantial reductions of the enhanced T1-weighted (58 ± 10%) and hyperintense FLAIR (53 ± 9%) lesion volumes were detected mainly during the first weeks of therapy, with a shift to an infiltrative pattern of tumor progression thereafter, as detected by an increase in tumor-infiltrative area in the majority of patients, which correlated with progression-free survival (week 8: r=-0.86, p=0.003, week 16: r=-0.99, p=0.001). CONCLUSION Characterization of non-enhancing hyperintense FLAIR lesion area in GB patients can provide an MR-based biomarker, indicating a shift to an infiltrative progression pattern, and may improve therapy response assessment in patients following bevacizumab therapy.
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Affiliation(s)
- Moran Artzi
- Functional Brain Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Felix Bokstein
- Neuro-Oncology Service, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
| | | | - Orna Aizenstein
- Functional Brain Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
| | - Gilad Liberman
- Functional Brain Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Gonda Multidisciplinary Brain Research Center, Bar Ilan University, Ramat Gan, Israel.
| | - Benjamin W Corn
- Functional Brain Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Institute of Radiotherapy, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
| | - Dafna Ben Bashat
- Functional Brain Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.
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Bell C, Pannek K, Fay M, Thomas P, Bourgeat P, Salvado O, Gal Y, Coulthard A, Crozier S, Rose S. Distance informed Track-Weighted Imaging (diTWI): A framework for sensitising streamline information to neuropathology. Neuroimage 2014; 86:60-6. [DOI: 10.1016/j.neuroimage.2013.07.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 07/29/2013] [Indexed: 12/13/2022] Open
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Non-invasive assessment of intratumoral vascularity using arterial spin labeling: A comparison to susceptibility-weighted imaging for the differentiation of primary cerebral lymphoma and glioblastoma. Eur J Radiol 2014; 83:806-10. [PMID: 24613549 DOI: 10.1016/j.ejrad.2014.01.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 01/08/2014] [Accepted: 01/15/2014] [Indexed: 01/27/2023]
Abstract
Using conventional MRI methods, the differentiation of primary cerebral lymphomas (PCNSL) and other primary brain tumors, such as glioblastomas, is difficult due to overlapping imaging characteristics. This study was designed to discriminate tumor entities using normalized vascular intratumoral signal intensity values (nVITS) obtained from pulsed arterial spin labeling (PASL), combined with intratumoral susceptibility signals (ITSS) from susceptibility-weighted imaging (SWI). Thirty consecutive patients with glioblastoma (n=22) and PCNSL (n=8), histologically classified according to the WHO brain tumor classification, were included. MRIs were acquired on a 3T scanner, and included PASL and SWI sequences. nVITS was defined by the signal intensity ratio between the tumor and the contralateral normal brain tissue, as obtained by PASL images. ITSS was determined as intratumoral low signal intensity structures detected on SWI sequences and were divided into four different grades. Potential differences in the nVITS and ITSS between glioblastomas and PCNSLs were revealed using statistical testing. To determine sensitivity, specificity, and diagnostic accuracy, as well as an optimum cut-off value for the differentiation of PCNSL and glioblastoma, a receiver operating characteristic analysis was used. We found that nVITS (p=0.011) and ITSS (p=0.001) values were significantly higher in glioblastoma than in PCNSL. The optimal cut-off value for nVITS was 1.41 and 1.5 for ITSS, with a sensitivity, specificity, and accuracy of more than 95%. These findings indicate that nVITS values have a comparable diagnostic accuracy to ITSS values in differentiating glioblastoma and PCNSL, offering a completely non-invasive and fast assessment of tumoral vascularity in a clinical setting.
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Noorbakhsh A, Tang JA, Marcus LP, McCutcheon B, Gonda DD, Schallhorn CS, Talamini MA, Chang DC, Carter BS, Chen CC. Gross-total resection outcomes in an elderly population with glioblastoma: a SEER-based analysis. J Neurosurg 2014; 120:31-9. [DOI: 10.3171/2013.9.jns13877] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
There is limited information on the relationship between patient age and the clinical benefit of resection in patients with glioblastoma. The purpose of this study was to use a population-based database to determine whether patient age influences the frequency that gross-total resection (GTR) is performed, and also whether GTR is associated with survival difference in different age groups.
Methods
The authors identified 20,705 adult patients with glioblastoma in the Surveillance, Epidemiology, and End Results (SEER) registry (1998–2009). Surgical practice patterns were defined by the categories of no surgery, subtotal resection (STR), and GTR. Kaplan-Meier and multivariate Cox regression analyses were used to assess the pattern of surgical practice and overall survival.
Results
The frequency that GTR was achieved in patients with glioblastoma decreased in a stepwise manner as a function of patient age (from 36% [age 18–44 years] to 24% [age ≥ 75]; p < 0.001). For all age groups, glioblastoma patients who were selected for and underwent GTR showed a 2- to 3-month improvement in overall survival (p < 0.001) relative to those who underwent STR. These trends remained true after a multivariate analysis that incorporated variables including ethnicity, sex, year of diagnosis, tumor size, tumor location, and radiotherapy status.
Conclusions
Gross-total resection is associated with improved overall survival, even in elderly patients with glioblastoma. As such, surgical decisions should be individually tailored to the patient rather than an adherence to age as the sole clinical determinant.
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Affiliation(s)
| | | | | | | | | | | | - Mark A. Talamini
- 3Department of Surgery, University of California, San Diego, California
| | - David C. Chang
- 3Department of Surgery, University of California, San Diego, California
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O'Connor KM, Barest G, Moritani T, Sakai O, Mian A. "Dazed and diffused": making sense of diffusion abnormalities in neurologic pathologies. Br J Radiol 2013; 86:20130599. [PMID: 24167185 DOI: 10.1259/bjr.20130599] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
To review diffusion abnormalities seen in diffusion-weighted MRI in neurological pathologies. We examine the clinical significance of the abnormalities in a broad spectrum of neurological diseases and highlight our current understanding of their causes. Diffusion abnormalities seen on diffusion-weighted MRI can play an important role in the diagnosis and follow-up of a broad spectrum of neurological diseases. A thorough understanding of the appearance and significance of these abnormalities is critical in patient management.
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Affiliation(s)
- K M O'Connor
- Department of Radiology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA
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Yamashita Y, Kumabe T, Higano S, Watanabe M, Tominaga T. Minimum apparent diffusion coefficient is significantly correlated with cellularity in medulloblastomas. Neurol Res 2013; 31:940-6. [PMID: 19138469 DOI: 10.1179/174313209x382520] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Yoji Yamashita
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan
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Advanced MR imaging of gliomas: an update. BIOMED RESEARCH INTERNATIONAL 2013; 2013:970586. [PMID: 23862163 PMCID: PMC3686060 DOI: 10.1155/2013/970586] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 04/12/2013] [Accepted: 05/13/2013] [Indexed: 02/07/2023]
Abstract
Recent advances in the treatment of cerebral gliomas have increased the demands on noninvasive neuroimaging for the diagnosis, therapeutic planning, tumor monitoring, and patient outcome prediction. In the meantime, improved magnetic resonance (MR) imaging techniques have shown much potentials in evaluating the key pathological features of the gliomas, including cellularity, invasiveness, mitotic activity, angiogenesis, and necrosis, hence, further shedding light on glioma grading before treatment. In this paper, an update of advanced MR imaging techniques is reviewed, and their potential roles as biomarkers of tumor grading are discussed.
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Rose S, Fay M, Thomas P, Bourgeat P, Dowson N, Salvado O, Gal Y, Coulthard A, Crozier S. Correlation of MRI-derived apparent diffusion coefficients in newly diagnosed gliomas with [18F]-fluoro-L-dopa PET: what are we really measuring with minimum ADC? AJNR Am J Neuroradiol 2012; 34:758-64. [PMID: 23079407 DOI: 10.3174/ajnr.a3315] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND PURPOSE There is significant interest in whether diffusion-weighted MR imaging indices, such as the minimum apparent diffusion coefficient, may be useful clinically for preoperative tumor grading and treatment planning. To help establish the pathologic correlate of minimum ADC, we undertook a study investigating the relationship between minimum ADC and maximum FDOPA PET uptake in patients with newly diagnosed glioblastoma multiforme. MATERIALS AND METHODS MR imaging and FDOPA PET data were acquired preoperatively from 15 patients who were subsequently diagnosed with high-grade brain tumor (WHO grade III or IV) by histopathologic analysis. ADC and SUVR normalized FDOPA PET maps were registered to the corresponding CE MR imaging. Regions of minimum ADC within the FDOPA-defined tumor volume were anatomically correlated with areas of maximum FDOPA SUVR uptake. RESULTS Minimal anatomic overlap was found between regions exhibiting minimum ADC (a putative marker of tumor cellularity) and maximum FDOPA SUVR uptake (a marker of tumor infiltration and proliferation). FDOPA SUVR measures for tumoral regions exhibiting minimum ADC (1.36±0.22) were significantly reduced compared with those with maximum FDOPA uptake (2.45±0.88, P=.0001). CONCLUSIONS There was a poor correlation between minimum ADC and the most viable/aggressive component of high-grade gliomas. This study suggests that other factors, such as tissue compression and ischemia, may be contributing to restricted diffusion in GBM. Caution should be exercised in the clinical use of minimum ADC as a marker of tumor grade and the use of this index for guiding tumor biopsies preoperatively.
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Affiliation(s)
- S Rose
- Centre for Clinical Research, Discipline of Medical Imaging, University of Queensland, St Lucia, Brisbane, Australia.
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Mong S, Ellingson BM, Nghiemphu PL, Kim HJ, Mirsadraei L, Lai A, Yong W, Zaw TM, Cloughesy TF, Pope WB. Persistent diffusion-restricted lesions in bevacizumab-treated malignant gliomas are associated with improved survival compared with matched controls. AJNR Am J Neuroradiol 2012; 33:1763-70. [PMID: 22538078 DOI: 10.3174/ajnr.a3053] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE A subset of patients with malignant glioma develops conspicuous lesions characterized by persistent restricted diffusion during treatment with bevacizumab. The purpose of the current study was to characterize the evolution of these lesions and to determine their relationship to patient outcome. MATERIALS AND METHODS Twenty patients with malignant glioma with persistent restricted-diffusion lesions undergoing treatment with bevacizumab were included in the current study. Mean ADC and the volume of restricted diffusion were computed for each patient during serial follow-up. Differences in TTP, TTS, and OS were compared between patients with restricted diffusion and matched controls by using Kaplan-Meier analysis with the logrank test and Cox hazard models. RESULTS Mean ADC values were generally stable with time (mean, 5.2 ± 12.6% change from baseline). The volume of restricted diffusion increased a median of 23% from baseline by 6 months. Patients with restricted-diffusion lesions had significantly greater TTP (logrank, P = .013), TTS (logrank, P = .008), and OS (logrank, P = .010) than matched controls. When available, advanced physiologic imaging of restricted-diffusion lesions showed hypovascularity on perfusion MR imaging and decreased amino acid uptake on (18)F-FDOPA PET scans. Atypical gelatinous necrotic tissue was confirmed in the area of restricted diffusion in 1 patient. CONCLUSIONS Restricted-diffusion lesions in malignant gliomas treated with bevacizumab are generally stable with time and are associated with improved outcomes. These results combined with physiologic imaging and histopathologic data suggest that these lesions are not consistent with aggressive tumor.
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Affiliation(s)
- S Mong
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095-1721, USA
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Toh CH, Wei KC, Chang CN, Hsu PW, Wong HF, Ng SH, Castillo M, Lin CP. Differentiation of pyogenic brain abscesses from necrotic glioblastomas with use of susceptibility-weighted imaging. AJNR Am J Neuroradiol 2012; 33:1534-8. [PMID: 22422181 DOI: 10.3174/ajnr.a2986] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND PURPOSE A common imaging finding in brain abscess and necrotic glioblastoma is a T2 hypointense margin. The features of this hypointense rim on SWI have not been previously described, to our knowledge. We aimed to differentiate abscesses from glioblastomas by assessing the morphology of their lesion margin by using SWI. MATERIALS AND METHODS T2WI and SWI were performed in 12 abscesses and 20 rim-enhancing glioblastomas. On T2WI and SWI, the prevalence and the border types (complete versus incomplete) of hypointense rims were qualitatively assessed. On SWI, the contour (smooth versus irregular) and the location of hypointense rims relative to the contrast-enhancing rims as well as the prevalence of the "dual rim sign," defined as 2 concentric rims at lesion margins with the outer one being hypointense and the inner one hyperintense relative to cavity contents, were also analyzed. RESULTS Prevalence and the border types of the hypointense rims on T2WI were not different between abscesses and glioblastomas. On SWI, there were significantly more hypointense rims that were complete (P < .001) and smooth (P < .001), having the same location as the contrast-enhancing rims (P < .001) for abscesses. A dual rim sign was present in 9 of 12 abscesses but absent in all glioblastomas (P < .001). CONCLUSIONS SWI may be helpful in differentiating pyogenic abscesses from necrotic glioblastomas. The dual rim sign is the most specific imaging feature distinguishing the 2.
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Affiliation(s)
- C H Toh
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Linkou and Chang Gung University College of Medicine, Tao-Yuan, Taiwan.
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Neuroimaging highlight - cerebral abscess crossing midline. Can J Neurol Sci 2012; 39:236-8. [PMID: 22343160 DOI: 10.1017/s0317167100013299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Toh CH, Wei KC, Ng SH, Wan YL, Lin CP, Castillo M. Differentiation of brain abscesses from necrotic glioblastomas and cystic metastatic brain tumors with diffusion tensor imaging. AJNR Am J Neuroradiol 2011; 32:1646-51. [PMID: 21835939 DOI: 10.3174/ajnr.a2581] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The differentiation of abscesses from glioblastomas and metastases may not always be possible on the basis of DWI. Our hypothesis was that differences in diffusion properties as detected by DTI allow differentiation of abscess from glioblastomas and metastasis. Furthermore, diagnostic performance of tensor metrics quantifying anisotropy or tensor shapes is better than that of ADC in measuring mean diffusivity for this purpose. MATERIALS AND METHODS DTI was performed in 15 abscesses, 15 necrotic glioblastomas, and 26 cystic metastases. In each lesion, manually segmented into 4 regions of interest (ie, cystic cavity, enhancing rim, and immediate [edema most adjacent to the enhancing rim] and distant zones of edema), FA, ADC, C(l), C(p), and C(s) values were measured and statistically compared among groups and evaluated with ROC curve analysis. The presence of a hyperintense FA rim (a rim of edematous tissue that was hyperintense on the FA map) was assessed visually. RESULTS Abscess was significantly different from glioblastoma for all tensor metrics measured in the cystic cavity and immediate zone of edema and for all except C(l) in the enhancing rim. Abscess was significantly different from metastasis for all tensor metrics measured in the cystic cavity and enhancing rim and for FA, ADC, and C(l) in immediate zone of edema. The incidence of a hyperintense FA rim was significantly higher in glioblastoma and metastasis compared with abscess. The 3 tensor metrics with the highest performance in differentiating abscess from glioblastoma and metastasis were FA, C(l), and C(s) of the cystic cavity. CONCLUSIONS DTI is able to differentiate abscess from glioblastoma and metastasis. FA, C(l), and C(s) outperformed ADC in diagnostic performance comparisons.
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Affiliation(s)
- C H Toh
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Tao-Yuan, Taiwan
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Pyogenic abscess from Providencia stuartii mimicking necrotic tumour at perfusion-weighted imaging. Neurol Sci 2011; 32:919-23. [PMID: 21468679 DOI: 10.1007/s10072-011-0565-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 03/19/2011] [Indexed: 10/18/2022]
Abstract
The purpose of this case report is to increase the knowledge about magnetic resonance spectrum of pyogenic abscesses of the brain. A 74-year-old woman presented with a left frontal lobe cystic mass, developed in the site of post-traumatic contusions after surgical evacuation of a subdural hematoma. MR imaging showed an ipsilateral mass lesion with a thin, regular rim of T1 high-intensity signal, T2 low-intensity signal, and gadolinium-enhancement. Diffusion-weighted imaging with measure of apparent diffusion coefficient value showed inhomogenous diffusion restriction in the lesion core. Perfusion-weighted imaging (PWI) demonstrated high relative cerebral blood volume (rCBV) in both the lesion wall and perilesional area, with a maximal rCBV ratio (rCBV of the lesion/rCBV of the normal contralateral white matter) of 5.65 and 0.58, respectively. As a result, surgery and pathology showed a pyogenic abscess. Cultures grew were Providencia stuartii species. In conclusion, a pyogenic brain abscess from P. stuartii may show high rCBV at PWI, thus mimicking a necrotic tumour.
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Pruzincová L, Steno J, Srbecký M, Kalina P, Rychlý B, Boljesíková E, Chorváth M, Novotný M, Procka V, Makaiová I, Belan V. MR imaging of late radiation therapy- and chemotherapy-induced injury: a pictorial essay. Eur Radiol 2009; 19:2716-27. [PMID: 19471942 DOI: 10.1007/s00330-009-1449-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Revised: 03/19/2009] [Accepted: 03/27/2009] [Indexed: 11/29/2022]
Abstract
Radiation to the brain and adjuvant chemotherapy may produce late delayed changes from several months to years after treatment of intracranial malignancies with a reported prevalence of 5-24%. The pattern of treatment-related injury may vary from diffuse periventricular white matter lesions to focal or multifocal lesions. Differentiation of treatment-related injury from tumor progression/recurrence may be difficult with conventional MR imaging (MRI). With both disease processes, the characteristic but nonspecific imaging features are vasogenic edema, contrast enhancement, and mass effect. This pictorial essay presents MRI spectra of late therapy-induced injuries in the brain with a particular emphasis on radiation necrosis, the most common and severe form. Novel MRI techniques, such as diffusion-weighted imaging (DWI), proton MR spectroscopy (MRS), and perfusion MRI, improve the possibilities of better characterization of treatment-related changes. Advanced MRI techniques allow for the assessment of metabolism and physiology and may increase specificity for therapy-induced changes.
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Affiliation(s)
- L Pruzincová
- Department of Radiology, Derer's University Hospital, Bratislava, Slovakia.
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Hauck EF, McGinnis M, Nauta HJ. Cerebral phaeohyphomycosis mimics high-grade astrocytoma. J Clin Neurosci 2008; 15:1061-6. [DOI: 10.1016/j.jocn.2007.08.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 08/01/2007] [Accepted: 08/09/2007] [Indexed: 10/21/2022]
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Zacharia TT, Law M, Naidich TP, Leeds NE. Central nervous system lymphoma characterization by diffusion-weighted imaging and MR spectroscopy. J Neuroimaging 2008; 18:411-7. [PMID: 18494774 DOI: 10.1111/j.1552-6569.2007.00231.x] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
PURPOSE The characterization and differentiation of central nervous system (CNS) lymphoma has important diagnostic, therapeutic, and prognostic significance. The purpose of this study is to characterize the diffusion-weighted imaging (DWI) and MR spectroscopic (MRS) findings in CNS lymphoma. MATERIALS AND METHODS Twenty consecutive patients (male [n= 12], female [n= 8]) with histopathologically proven CNS lymphoma were retrospectively evaluated during this study from July 2005 to April 2007. Patients included immunocompromised (n= 9) and immunocompetent (n= 11) individuals. MR Imaging (pretreatment n= 13), pre- and post-treatment (n= 7) included DWI (n= 20) (b = 1000s/mm2) and ADC (apparent diffusion coefficient) maps of all patients. MRS was performed (n= 10) with PRESS (point-resolved spectroscopy) sequence (multivoxel n= 8, single voxel n= 2) with a TE of 144 msec. All patients were histopathologically confirmed to have lymphoma by biopsy. RESULTS Areas of restricted diffusion were observed in 90 % (n= 18/20) on pretreatment scans. The diffusion restriction was variable on post-treatment scans. Median metabolite ratios in 10 patients were Cho/Cr- 2.12, NAA/Cho - .49, and NAA/Cr - 1.64. Presence of lactate or lipid was noted in 90 % (n= 9/10). Sites of lesion location were subcortical white matter (n= 6), basal ganglia (n= 4), corpus callosum (n= 3), extra-axial space including cavernous sinus (n= 5), cerebellum (n= 1), and lateral ventricle (n= 1). CONCLUSION Restricted diffusion is a consistent imaging finding in CNS lymphoma in immunocompetent patients. Spectroscopy is helpful in initial imaging diagnosis and post-treatment surveillance. These lesions are usually paraventricular in location. MR imaging appearances differ among immunocompetent and immunosuppressed individuals in most cases.
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Muccio CF, Esposito G, Bartolini A, Cerase A. Cerebral abscesses and necrotic cerebral tumours: differential diagnosis by perfusion-weighted magnetic resonance imaging. Radiol Med 2008; 113:747-57. [PMID: 18414811 DOI: 10.1007/s11547-008-0254-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Accepted: 07/12/2007] [Indexed: 11/28/2022]
Abstract
PURPOSE This study was undertaken to evaluate the usefulness of perfusion-weighted imaging (PWI) in the differential diagnosis of ring-enhancing cerebral lesions, including abscesses, high-grade gliomas and metastases. MATERIALS AND METHODS Nine cerebral abscesses (five pyogenic, four from Toxoplasma gondii), ten glioblastomas and five cerebral metastases in 19 patients were studied with gadolinium-enhanced magnetic resonance imaging, diffusion-weighted imaging (DWI) including calculation of mean apparent diffusion coefficient (ADC) of the lesion core, and PWI. At PWI, the mean of the maximum regional cerebral blood volume (rCBV) was calculated in the gadolinium-enhancing peripheral solid areas and compared with that of the contralateral normal-appearing white matter [ratio=rCBV (lesion)/rCBV (contralateral normal-appearing white matter)]. RESULTS DWI achieved the differential diagnosis in all cases except for the four Toxoplasma abscesses. At PWI, the mean ratio of the rCBV of the capsular portion was 0.72+/-0.08 (range 0.60-0.82) in the pyogenic abscesses, 0.84+/-0.07 (range 0.75-0.91) in the Toxoplasma abscesses, 4.45+/-1.5 (range 2.9-8.0) in the high-grade gliomas and 3.58+/-0.68 (range 3.28-4.27) in the metastases. CONCLUSIONS PWI seems to be useful in the differential diagnosis of ring-enhancing cerebral lesions. High rCBV values in the peripheral areas appear to indicate the possibility of a necrotic tumour, whereas low values tend to indicate an abscess.
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Affiliation(s)
- C F Muccio
- U.O. Neuroradiologia, Dipartimento di Neuroscienze, A.O. "G. Rummo", Via dell'Angelo 1, 82100 Benevento, Italy.
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Toh CH, Castillo M, Wong AMC, Wei KC, Wong HF, Ng SH, Wan YL. Primary cerebral lymphoma and glioblastoma multiforme: differences in diffusion characteristics evaluated with diffusion tensor imaging. AJNR Am J Neuroradiol 2008; 29:471-5. [PMID: 18065516 DOI: 10.3174/ajnr.a0872] [Citation(s) in RCA: 177] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Differentiating between primary cerebral lymphoma and glioblastoma multiforme (GBM) based on conventional MR imaging sequences may be impossible. Our hypothesis was that there are significant differences in fractional anisotropy (FA) and apparent diffusion coefficient (ADC) between lymphoma and GBM, which will allow for differentiation between them. MATERIALS AND METHODS Preoperative diffusion tensor imaging (DTI) was performed in 10 patients with lymphoma and 10 patients with GBM. Regions of interest were placed in only solid-enhancing tumor areas and the contralateral normal-appearing white matter (NAWM) to measure the FA and ADC values. The differences in FA and ADC between lymphoma and GBM, as well as between solid-enhancing areas of each tumor type and contralateral NAWM, were analyzed statistically. Cutoff values of FA, FA ratio, ADC, and ADC ratio for distinguishing lymphomas from GBMs were determined by receiver operating characteristic curve analysis. RESULTS FA and ADC values of lymphoma were significantly decreased compared with NAWM. Mean FA, FA ratio, ADC (x10(-3) mm(2)/s), and ADC ratios were 0.140 +/- 0.024, 0.25 +/- 0.04, 0.630 +/- 0.155, and 0.83 +/- 0.14 for lymphoma, respectively, and 0.229 +/- 0.069, 0.40 +/- 0.12, 0.963 +/- 0.119, and 1.26 +/- 0.13 for GBM, respectively. All of the values were significantly different between lymphomas and GBM. Cutoff values to differentiate lymphomas from GBM were 0.192 for FA, 0.33 for FA ratio, 0.818 for ADC, and 1.06 for ADC ratio. CONCLUSIONS The FA and ADC of primary cerebral lymphoma were significantly lower than those of GBM. DTI is able to differentiate lymphomas from GBM.
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Affiliation(s)
- C-H Toh
- Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Tao-Yuan, Taiwan.
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Garzoni C, Markham L, Bijlenga P, Garbino J. Cladophialophora bantiana: a rare cause of fungal brain abscess. Clinical aspects and new therapeutic options. Med Mycol 2008; 46:481-6. [DOI: 10.1080/13693780801914906] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Zisakis A, Piperi C, Themistocleous MS, Korkolopoulou P, Boviatsis EI, Sakas DE, Patsouris E, Lea RW, Kalofoutis A. Comparative analysis of peripheral and localised cytokine secretion in glioblastoma patients. Cytokine 2007; 39:99-105. [PMID: 17697783 DOI: 10.1016/j.cyto.2007.05.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 05/17/2007] [Accepted: 05/25/2007] [Indexed: 11/16/2022]
Abstract
BACKGROUND Malignant gliomas are the most common primary brain tumours of both children and adults. The unique aspects of their biology and anatomic site render them refractory to conventional therapeutic strategies such as surgery and chemotherapy. Significant attention has been given, recently, to immunotherapy which, although promising in preclinical studies, has not yet enhanced the survival of patients with glioblastomas. METHODS To further understand the immunobiology of glioblastomas in clinical settings, we examined the secretion of four main cytokines in the peripheral blood and in primary cell cultures of 33 human glioblastoma patients. An ELISPOT methodology was used for the first time to examine Th1, and Th2 cytokine secretion from both peripheral lymphocytes and glioma tumour cells. RESULTS Th1 cytokines (tumour necrosis factor (TNF-alpha), interferon (IFN-gamma) were markedly reduced compared to control levels (P=0.01 and P<0.001, respectively), whereas in contrast, Th2 (interleukin (IL)-4 and IL-10) were strongly expressed in both peripheral lymphocytes and glioma cell cultures (P=0.05 and P<0.001, respectively). CONCLUSION This pattern indicates an 'immunosuppressive status' in glioblastomas which is related to their origination and the evasion of glioma cells from immune surveillance and could account for the failure of immunotherapy in such tumours. Furthermore, ELISPOT methodology can be used for monitoring of cytokine secretion from tumour cells, in addition to the well-established peripheral cytokine secretion.
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Affiliation(s)
- Athanasios Zisakis
- Laboratory of Biological Chemistry, University of Athens Medical School, M. Asias 75, Goudi 11527, Athens, Greece
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Abstract
Establishing the diagnosis of a brain tumour is not always a straightforward process. Many non-neoplastic neurological diseases can mimic brain neoplasms on neuroimaging or on histological examination, including multiple sclerosis, stroke, pyogenic abscess, toxoplasmosis, tuberculosis, cysticercosis, fungal infections, syphilis, sarcoidosis, Behçet disease, radiation necrosis, venous thrombosis, and others. Conversely, several types of brain neoplasms, such as glioblastomas, low-grade gliomas, CNS lymphomas, and brain metastases, can present in the absence of typical tumefactive lesions, posing significant diagnostic challenges. In this Review, we discuss the process of accurately establishing the diagnosis of brain tumours, focusing on pitfalls commonly encountered in clinical practice. We also discuss the rational use and limitations of new diagnostic techniques, such as diffusion-weighted MRI, perfusion-weighted MRI, magnetic resonance spectroscopy, single-photon emission tomography, and positron emission tomography, as well as new tools for histological examination, such as immunohistochemistry and molecular genetics analysis.
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Affiliation(s)
- Antonio Mp Omuro
- AP-HP Hôpital Pitié-Salpêtrière, Service de Neurologie Mazarin, Universite Paris VI Pierre et Marie Curie, IFR 70, Unite Inserm U711, Paris, France.
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