Objective:A high rate of unnecessary thymectomies has been reported.This study aimed to distinguish primary mediastinal lymphomas(PMLs)from thymic epithelial tumors(TETs)by evaluating volumetric and metabolic paramete...Objective:A high rate of unnecessary thymectomies has been reported.This study aimed to distinguish primary mediastinal lymphomas(PMLs)from thymic epithelial tumors(TETs)by evaluating volumetric and metabolic parameters with l8F-FDG PET/CT.Methods:A total of 136 patients who were pathologically diagnosed with TETs or PMLs were enrolled,and 18F-FDG PET/CT was performed before therapy.Volumetric parameters,including the mean SUV(SUVmean),metabolic tumor volume(MTV),total lesion glycolysis(TLG),and SUVmax,were determined and compared between the 2 subtypes.The diagnostic performance of these parameters was evaluated with receiver operating characteristic(ROC)curve analysis.Results:All parameters significantly differed between patients with PMLs and TETs.Patients with lymphomas were younger and had higher SUVmean,SUVmax,TLG,and MTV values than patients with TETs.The MTV and TLG values had similar diagnostic performance.ROC analysis indicated that the areas under the curves of the SUVmean and SUVmax values performed similarly(approximately 0.76)in differentiating patients with PMLs from TETs,and both values were better than the MTV and TLG values.When age was included with the SUVmax in differentiating TETs from PMLs,the AUC was 0.91,and the sensitivity and specificity increased to 80%and 93%,respectively.Conclusions:The SUVmax and volumetric parameters of 18F-FDG PET/CT can be used to distinguish patients with PMLs versus TETs,and thus may aid in preventing unnecessary thymectomies or other invasive operations.展开更多
Thymic epithelial tumors(TETs) are uncommon neoplasms with a wide range of anatomical, clinical, histological and molecular malignant entities. To date the management of TETs within clinical practice is based on a mul...Thymic epithelial tumors(TETs) are uncommon neoplasms with a wide range of anatomical, clinical, histological and molecular malignant entities. To date the management of TETs within clinical practice is based on a multimodal therapeutic strategy including surgery, chemotherapy and radiotherapy with a multidisciplinary approach and prognostic evaluation is mainly based on Masaoka staging and World Health Organization classification. Therefore novel strategies are needed, especially for refractory and/or recurrent TETs and for thymic carcinomas that present a poor prognosis. Personalized approaches are currely being developed and molecular targets are emerging from recent integrated genomic analyses. Targeted therapy will represent an important treatment option for TETs with an aggressive histology. To date, data indicate that vascular endothelial growth factor molecules, insulinlike growth factor 1 receptor, cyclin-dependent kinases and mammalian target of rapamycin may be potentially useful as targeted biological therapies.展开更多
Thymic epithelial tumours(TET)are rare,heterogeneous neoplasms that range from resectable indolent tumours to aggressive thymic carcinomas with a strong tendency to metastasize.The pathological diagnosis is complex,in...Thymic epithelial tumours(TET)are rare,heterogeneous neoplasms that range from resectable indolent tumours to aggressive thymic carcinomas with a strong tendency to metastasize.The pathological diagnosis is complex,in part due to the management of TETs is scant and mainly based on non-randomised studies and retrospective series.Consequently,the clinical management of TETs tends to be highly heterogenous,which makes it difficult to improve the evidence level.The role of technological advances in the field of radiotherapy and new systemic therapies in the treatment of TETs has received little attention to date.In the present clinical guidelines,developed by the GOECP/SEOR,we review recent developments in the diagnosis and classification of TETs.We also present a consensus-based therapeutic strategy for each disease stage that takes into consideration the best available evidence.These guidelines focus primarily on the role of radiotherapy,including recent advances,in the management of TETs.The main aim of this document is to promote the standardisation of clinical practice and lay the foundations for future studies to clarify the main unresolved questions related to the optimal management of TET.展开更多
目的探讨^(18)F-FDG符合线路SPECT/CT显像与胸腺上皮肿瘤组织学分型的相关性。方法 2013年8月~2016年9月期间病理确诊的17例胸腺上皮肿瘤患者,回顾性分析患者治疗前的^(18)F-FDG符合线路及CT图像。记录病理分型、CT征象、符合线路图像...目的探讨^(18)F-FDG符合线路SPECT/CT显像与胸腺上皮肿瘤组织学分型的相关性。方法 2013年8月~2016年9月期间病理确诊的17例胸腺上皮肿瘤患者,回顾性分析患者治疗前的^(18)F-FDG符合线路及CT图像。记录病理分型、CT征象、符合线路图像病灶目测分级和病灶放射性摄取值与纵隔及肺本底的比值(T/M和T/L)。结果低危组胸腺上皮肿瘤7例(A型胸腺瘤1例,AB型胸腺瘤3例,B1型胸腺瘤3例),高危组胸腺上皮肿瘤10例(B2型2例,B3型1例,胸腺鳞癌7例)。WHO组织学分型与目测分级、T/L和T/M高度相关(r分别为0.697,0.811和0.815,P值为0.002,0.000和0.000),与肿瘤的长径和短径无明显相关。以目测肿块放射性高于纵隔诊断高危胸腺瘤的敏感性为100%,特异性为71.4%,准确率为88.2%,阳性预测值83.3%,阴性预测值100%。低危与高危胸腺上皮肿瘤组之间的CT表现包括肿块长径、短径、肿块有无坏死、钙化、分叶、肿块周围脂肪间隙是否清晰,有无淋巴结转移、胸膜转移、肺内转移、是否均匀强化和肿块内肿瘤血管在两组中无显著差异,而低危和高危组在SPECT/CT符合线路显像上肿块的目测分级(2.0 vs 3.7,P=0.001)、T/L(5.4 vs 16.3,P=0.002)和T/M(1.2 vs 10.4,P=0.002)有显著性差异。结论胸腺上皮肿瘤组织学分型与肿块糖代谢摄取程度呈显著正相关,以^(18)F-FDG符合线路显像肿块目测分级高于纵隔诊断高危胸腺瘤准确性高,为术前制定个体化的治疗方案提供有价值的信息。展开更多
基金the Tianjin Science and Technology Program Fund(grant No.18 PTZWHZ00100 and H2018206600).
文摘Objective:A high rate of unnecessary thymectomies has been reported.This study aimed to distinguish primary mediastinal lymphomas(PMLs)from thymic epithelial tumors(TETs)by evaluating volumetric and metabolic parameters with l8F-FDG PET/CT.Methods:A total of 136 patients who were pathologically diagnosed with TETs or PMLs were enrolled,and 18F-FDG PET/CT was performed before therapy.Volumetric parameters,including the mean SUV(SUVmean),metabolic tumor volume(MTV),total lesion glycolysis(TLG),and SUVmax,were determined and compared between the 2 subtypes.The diagnostic performance of these parameters was evaluated with receiver operating characteristic(ROC)curve analysis.Results:All parameters significantly differed between patients with PMLs and TETs.Patients with lymphomas were younger and had higher SUVmean,SUVmax,TLG,and MTV values than patients with TETs.The MTV and TLG values had similar diagnostic performance.ROC analysis indicated that the areas under the curves of the SUVmean and SUVmax values performed similarly(approximately 0.76)in differentiating patients with PMLs from TETs,and both values were better than the MTV and TLG values.When age was included with the SUVmax in differentiating TETs from PMLs,the AUC was 0.91,and the sensitivity and specificity increased to 80%and 93%,respectively.Conclusions:The SUVmax and volumetric parameters of 18F-FDG PET/CT can be used to distinguish patients with PMLs versus TETs,and thus may aid in preventing unnecessary thymectomies or other invasive operations.
文摘Thymic epithelial tumors(TETs) are uncommon neoplasms with a wide range of anatomical, clinical, histological and molecular malignant entities. To date the management of TETs within clinical practice is based on a multimodal therapeutic strategy including surgery, chemotherapy and radiotherapy with a multidisciplinary approach and prognostic evaluation is mainly based on Masaoka staging and World Health Organization classification. Therefore novel strategies are needed, especially for refractory and/or recurrent TETs and for thymic carcinomas that present a poor prognosis. Personalized approaches are currely being developed and molecular targets are emerging from recent integrated genomic analyses. Targeted therapy will represent an important treatment option for TETs with an aggressive histology. To date, data indicate that vascular endothelial growth factor molecules, insulinlike growth factor 1 receptor, cyclin-dependent kinases and mammalian target of rapamycin may be potentially useful as targeted biological therapies.
文摘Thymic epithelial tumours(TET)are rare,heterogeneous neoplasms that range from resectable indolent tumours to aggressive thymic carcinomas with a strong tendency to metastasize.The pathological diagnosis is complex,in part due to the management of TETs is scant and mainly based on non-randomised studies and retrospective series.Consequently,the clinical management of TETs tends to be highly heterogenous,which makes it difficult to improve the evidence level.The role of technological advances in the field of radiotherapy and new systemic therapies in the treatment of TETs has received little attention to date.In the present clinical guidelines,developed by the GOECP/SEOR,we review recent developments in the diagnosis and classification of TETs.We also present a consensus-based therapeutic strategy for each disease stage that takes into consideration the best available evidence.These guidelines focus primarily on the role of radiotherapy,including recent advances,in the management of TETs.The main aim of this document is to promote the standardisation of clinical practice and lay the foundations for future studies to clarify the main unresolved questions related to the optimal management of TET.
文摘目的探讨^(18)F-FDG符合线路SPECT/CT显像与胸腺上皮肿瘤组织学分型的相关性。方法 2013年8月~2016年9月期间病理确诊的17例胸腺上皮肿瘤患者,回顾性分析患者治疗前的^(18)F-FDG符合线路及CT图像。记录病理分型、CT征象、符合线路图像病灶目测分级和病灶放射性摄取值与纵隔及肺本底的比值(T/M和T/L)。结果低危组胸腺上皮肿瘤7例(A型胸腺瘤1例,AB型胸腺瘤3例,B1型胸腺瘤3例),高危组胸腺上皮肿瘤10例(B2型2例,B3型1例,胸腺鳞癌7例)。WHO组织学分型与目测分级、T/L和T/M高度相关(r分别为0.697,0.811和0.815,P值为0.002,0.000和0.000),与肿瘤的长径和短径无明显相关。以目测肿块放射性高于纵隔诊断高危胸腺瘤的敏感性为100%,特异性为71.4%,准确率为88.2%,阳性预测值83.3%,阴性预测值100%。低危与高危胸腺上皮肿瘤组之间的CT表现包括肿块长径、短径、肿块有无坏死、钙化、分叶、肿块周围脂肪间隙是否清晰,有无淋巴结转移、胸膜转移、肺内转移、是否均匀强化和肿块内肿瘤血管在两组中无显著差异,而低危和高危组在SPECT/CT符合线路显像上肿块的目测分级(2.0 vs 3.7,P=0.001)、T/L(5.4 vs 16.3,P=0.002)和T/M(1.2 vs 10.4,P=0.002)有显著性差异。结论胸腺上皮肿瘤组织学分型与肿块糖代谢摄取程度呈显著正相关,以^(18)F-FDG符合线路显像肿块目测分级高于纵隔诊断高危胸腺瘤准确性高,为术前制定个体化的治疗方案提供有价值的信息。
