PURPOSE: To assess mediastinal lymphadenopathy in children with diffusion-weighted MR imaging. MATERIALS AND METHODS: Retrospective analysis of 29 consecutive children (18 boys and 11 girls aged 2-15 years) with mediastinal lymphadenopathy. They underwent single-shot echo planar diffusion-weighted MR imaging of the mediastinum with b factors of 0, 300, and 600 s/mm(2). The ADC value of the mediastinal lymph nodes was calculated and correlated with biopsy results; statistical analysis was also performed. RESULTS: The mean ADC value for malignant mediastinal lymphadenopathy (n = 20) (0.99 ± 0.18 × 10(-3) mm(2)/s) was significantly lower (P = 0.001) than that for benign lymphadenopathy (n = 9) (1.35 ± 0.26 × 10(-3) mm(2)/s). There was significant difference between ADC values for non-Hodgkin lymphoma and metastatic nodes (P = 0.04). For differentiating malignant from benign mediastinal lymphadenopathy, the best result was obtained when an ADC value of 1.22 × 10(-3) mm(2)/s was used as a threshold value; area under the curve was 0.861, accuracy 93.1 %, sensitivity 100 %, specificity of 77.8 %, positive predictive value 90.9 %, and negative predictive value of 100 %. CONCLUSION: Diffusion-weighted MR imaging is a promising non-invasive imaging modality that can be used for differentiation of malignant from benign mediastinal lymphadenopathy in children.
PURPOSE: To assess mediastinal lymphadenopathy in children with diffusion-weighted MR imaging. MATERIALS AND METHODS: Retrospective analysis of 29 consecutive children (18 boys and 11 girls aged 2-15 years) with mediastinal lymphadenopathy. They underwent single-shot echo planar diffusion-weighted MR imaging of the mediastinum with b factors of 0, 300, and 600 s/mm(2). The ADC value of the mediastinal lymph nodes was calculated and correlated with biopsy results; statistical analysis was also performed. RESULTS: The mean ADC value for malignant mediastinal lymphadenopathy (n = 20) (0.99 ± 0.18 × 10(-3) mm(2)/s) was significantly lower (P = 0.001) than that for benign lymphadenopathy (n = 9) (1.35 ± 0.26 × 10(-3) mm(2)/s). There was significant difference between ADC values for non-Hodgkin lymphoma and metastatic nodes (P = 0.04). For differentiating malignant from benign mediastinal lymphadenopathy, the best result was obtained when an ADC value of 1.22 × 10(-3) mm(2)/s was used as a threshold value; area under the curve was 0.861, accuracy 93.1 %, sensitivity 100 %, specificity of 77.8 %, positive predictive value 90.9 %, and negative predictive value of 100 %. CONCLUSION: Diffusion-weighted MR imaging is a promising non-invasive imaging modality that can be used for differentiation of malignant from benign mediastinal lymphadenopathy in children.
Authors: Luke McCrone; Sarah Alexander; Cengiz Karsli; Glenn Taylor; Joao G Amaral; Dimitri Parra; Michael Temple; Philip John; Bairbre L Connolly Journal: Pediatr Radiol Date: 2011-08-24
Authors: Jin Cheng; Yi Wang; Jie Deng; Robert J McCarthy; Gongwei Wang; He Wang; Yingjiang Ye Journal: J Magn Reson Imaging Date: 2012-11-21 Impact factor: 4.813
Authors: Francisco de Souza Santos; Nupur Verma; Guilherme Watte; Edson Marchiori; Tan-Lucien H Mohammed; Tássia Machado Medeiros; Bruno Hochhegger Journal: Radiol Bras Date: 2021 Jul-Aug