Diffusion-weighted imaging and susceptibility-weighted imaging in differentiating ring-enhancing primary central nervous system lymphoma from infections.
{"title":"Diffusion-weighted imaging and susceptibility-weighted imaging in differentiating ring-enhancing primary central nervous system lymphoma from infections.","authors":"Nutchawan Jittapiromsak, Phanuphong Sriinkua, Pornpattra Nimitpornsuko, Pakrit Jittapiromsak","doi":"10.1177/19714009251354883","DOIUrl":null,"url":null,"abstract":"<p><p>IntroductionDifferentiating ring-enhancing primary central nervous system lymphoma (PCNSL) from infections is critical yet challenging in clinical practice. This study aimed to evaluate the effectiveness of diffusion-weighted imaging (DWI) and susceptibility-weighted imaging (SWI) in differentiating ring-enhancing PCNSL from infections.Material and MethodsWe retrospectively reviewed 78 ring-enhancing lesions in 32 patients who underwent brain magnetic resonance imaging (MRI). Qualitative and quantitative assessments of the peripheral and central regions of ring-enhancing lesions were independently performed. The qualitative assessment involved evaluating restricted diffusion on DWI and intralesional susceptibility signal (ISS) on SWI. The quantitative assessment involved comparing the apparent diffusion coefficient average (ADC<sub>avg</sub>) ratio and apparent diffusion coefficient minimum (ADC<sub>min</sub>) ratio of the peripheral and central regions with the final diagnosis.ResultsThe lesions consisted of PCNSL (<i>n</i> = 21), tuberculosis (<i>n</i> = 17), and toxoplasmosis (<i>n</i> = 40). The qualitative assessment showed that diffusion was significantly more restricted at the periphery in PCNSL (<i>p</i> < .001) and that ISS positivity was significantly higher both peripherally (<i>p</i> < .001) and centrally (<i>p</i> = .001) in PCNSL than in infections. The quantitative assessment revealed that PCNSL had significantly lower ADC<sub>avg</sub> (peripheral, <i>p</i> < .001; central, <i>p</i> = .01) and ADC<sub>min</sub> ratios (peripheral, <i>p</i> < .001; central, <i>p</i> = .025) compared to infections. A peripheral ADC<sub>avg</sub> ratio of <1.25 demonstrated the best diagnostic accuracy (area under the curve: 0.966, 95% confidence interval [CI]: 0.93-1.00, sensitivity: 85.7%, specificity: 89.5%, and accuracy: 88.5%) for differentiating PCNSL from infections.ConclusionRestricted diffusion on DWI, positive ISS on SWI, and ADC ratio measurements of ring-enhancing lesions demonstrate significant potential as adjunctive imaging features for distinguishing PCNSL from CNS infections.</p>","PeriodicalId":47358,"journal":{"name":"Neuroradiology Journal","volume":" ","pages":"19714009251354883"},"PeriodicalIF":1.3000,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12185441/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Neuroradiology Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/19714009251354883","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"NEUROIMAGING","Score":null,"Total":0}
引用次数: 0
Abstract
IntroductionDifferentiating ring-enhancing primary central nervous system lymphoma (PCNSL) from infections is critical yet challenging in clinical practice. This study aimed to evaluate the effectiveness of diffusion-weighted imaging (DWI) and susceptibility-weighted imaging (SWI) in differentiating ring-enhancing PCNSL from infections.Material and MethodsWe retrospectively reviewed 78 ring-enhancing lesions in 32 patients who underwent brain magnetic resonance imaging (MRI). Qualitative and quantitative assessments of the peripheral and central regions of ring-enhancing lesions were independently performed. The qualitative assessment involved evaluating restricted diffusion on DWI and intralesional susceptibility signal (ISS) on SWI. The quantitative assessment involved comparing the apparent diffusion coefficient average (ADCavg) ratio and apparent diffusion coefficient minimum (ADCmin) ratio of the peripheral and central regions with the final diagnosis.ResultsThe lesions consisted of PCNSL (n = 21), tuberculosis (n = 17), and toxoplasmosis (n = 40). The qualitative assessment showed that diffusion was significantly more restricted at the periphery in PCNSL (p < .001) and that ISS positivity was significantly higher both peripherally (p < .001) and centrally (p = .001) in PCNSL than in infections. The quantitative assessment revealed that PCNSL had significantly lower ADCavg (peripheral, p < .001; central, p = .01) and ADCmin ratios (peripheral, p < .001; central, p = .025) compared to infections. A peripheral ADCavg ratio of <1.25 demonstrated the best diagnostic accuracy (area under the curve: 0.966, 95% confidence interval [CI]: 0.93-1.00, sensitivity: 85.7%, specificity: 89.5%, and accuracy: 88.5%) for differentiating PCNSL from infections.ConclusionRestricted diffusion on DWI, positive ISS on SWI, and ADC ratio measurements of ring-enhancing lesions demonstrate significant potential as adjunctive imaging features for distinguishing PCNSL from CNS infections.
期刊介绍:
NRJ - The Neuroradiology Journal (formerly Rivista di Neuroradiologia) is the official journal of the Italian Association of Neuroradiology and of the several Scientific Societies from all over the world. Founded in 1988 as Rivista di Neuroradiologia, of June 2006 evolved in NRJ - The Neuroradiology Journal. It is published bimonthly.