Central neurotoxicity of standard treatment in patients with newly-diagnosed high-grade glioma: a prospective longitudinal study

Following tumor resection, the majority of high-grade glioma (HGG) patients are treated with a combined modality regimen of radiotherapy and temozolomide. As a result of the tumor itself or as treatment-related neurotoxic side-effects, these patients may experience cognitive deficits. Additionally, radiological abnormalities expressed as white matter hyperintensities (WMH) and cerebral atrophy (CA) can develop. In this study, these functional and morphological parameters are evaluated, and their relation is investigated. After surgery, HGG patients underwent chemo-irradiation for six weeks, followed by six cycles of temozolomide. Assessments were performed before chemo-irradiation, post-concomitantly, after the third and sixth adjuvant cycle, and 3 and 7 months after treatment. Degree of WMH and CA was scored on MRI. Patients’ neuropsychological performance was compared to healthy matched controls, yielding six cognitive domain z-scores. Development or progression of pre-existing WMH and CA during follow-up was observed in 36 and 45 % of the patients (n = 39) respectively. Cognitive functioning remained stable or improved in 70 % of the patients and deteriorated in 30 % of the patients (n = 33). Of the cognitive decliners, 80 % had tumor progression within 4 months thereafter. No clear association between cognitive functioning and WMH or CA was found. Central neurotoxic effects of combined modality treatment in HGG patients expressed by radiological abnormalities are encountered in approximately 40 % of patients. However, functional impact as indexed by cognitive functioning was found to be limited. Furthermore, development or progression of pre-existing WMH and CA does not consistently result in functional impairment as measured by cognitive tests.     

A case report of pseudoprogression followed by complete remission after proton-beam irradiation for a low-grade glioma in a teenager: the value of dynamic contrast-enhanced MRI

Background

There are no specific recommendations for the management of breast cancer patients with germ-line p53 mutations, an exceptional genetic condition, particularly regarding postoperative radiotherapy. Preclinical data suggested that p53 mutations conferred enhanced radiosensitivity in vitro and in vivo and the few clinical observations showed that Li-Fraumeni families were at a higher risk of secondary radio-induced malignancies.

Methods

We reviewed a cohort of patients with germ-line p53 mutations who had been treated for breast cancer as the first tumor event. We assessed their outcome and the incidence of secondary radio-induced malignancies.

Results

Among 47 documented Li-Fraumeni families treated from 1997 to 2007 at the Institut Gustave Roussy, 8 patients had been diagnosed with breast cancer as the first tumor event. Three patients had undergone conservative breast surgery followed by postoperative radiotherapy and five patients had undergone a mastectomy (3 with postoperative radiotherapy). Thus, 6/8 patients had received postoperative radiotherapy. Median follow-up was 6 years. Median age at the diagnosis of the primary breast cancer was 30 years. The histological characteristics were as follows: intraductal carcinoma in situ (n = 3), invasive ductal carcinoma (n = 4) and a phyllodes tumor (n = 1). Among the 6 patients who had received adjuvant radiotherapy, the following events had occurred: 3 ipsilateral breast recurrences, 3 contralateral breast cancers, 2 radio-induced cancers, and 3 new primaries (1 of which was an in-field thyroid cancer with atypical histology). In contrast, only one event had occurred (a contralateral breast cancer) among patients who had not received radiation therapy.

Conclusions

These observations could argue in favor of bilateral mastectomy and the avoidance of radiotherapy.     

Time-delayed contrast-enhanced MRI improves detection of brain metastases: a prospective validation of diagnostic yield

The radiological detection of brain metastases (BMs) is essential for optimizing a patient’s treatment. This statement is even more valid when stereotactic radiosurgery, a noninvasive image guided treatment that can target BM as small as 1–2 mm, is delivered as part of that care. The timing of image acquisition after contrast administration can influence the diagnostic sensitivity of contrast enhanced magnetic resonance imaging (MRI) for BM. Investigate the effect of time delayed acquisition after administration of intravenous Gadavist® (Gadobutrol 1 mmol/ml) on the detection of BM. This is a prospective IRB approved study of 50 patients with BM who underwent post-contrast MRI sequences after injection of 0.1 mmol/kg Gadavist® as part of clinical care (time-t0), followed by axial T1 sequences after a 10 min (time-t1) and 20 min delay (time-t2). MRI studies were blindly compared by three neuroradiologists. Single measure intraclass correlation coefficients were very high (0.914, 0.904 and 0.905 for time-t0, time-t1 and time-t2 respectively), corresponding to a reliable inter-observer correlation. The delayed MRI at time-t2 delayed sequences showed a significant and consistently higher diagnostic sensitivity for BM by every participating neuroradiologist and for the entire cohort (p?=?0.016, 0.035 and 0.034 respectively). A disproportionately high representation of BM detected on the delayed studies was located within posterior circulation territories (compared to predictions based on tissue volume and blood-flow volumes). Considering the safe and potentially high yield nature of delayed MRI sequences, it should supplement the standard MRI sequences in all patients in need of precise delineation of their intracranial disease.     

神经导航联合荧光素钠在低级别胶质瘤手术中的应用

目的:探讨神经导航联合荧光素钠术中显影辅助在低级别胶质瘤手术中的安全性和有效性。方法:将显微镜下常规手术的21例低级别胶质瘤(low-grade glioma, LGG)患者临床资料归为常规手术组,分别使用5 mg/kg(常规剂量组21例)和1 mg/kg(小剂量组25例)的荧光素钠(fluorescein sodium, FLS)联合神经导航手术的46例LGG患者纳入研究,比较3组手术效果及术后6个月KPS评分。结果:常规剂量组、小剂量组、常规手术组的肿瘤全切除率分别为81.0%(17/21)、76.0%(19/25)、42.9%(9/21),对3组肿瘤切除程度、手术时间、出血量、术后6个月KPS评分进行两两对比,常规剂量组、小剂量组分别与常规手术组比较差异均有显著性(P<0.05),常规剂量组与小剂量组比较差异均无显著性(P>0.05)。3组并发症比较差异均无显著性(P>0.05)。常规剂量组、小剂量组显影率分别为76.2%(16/21)、68.0%(17/25),2组比较差异均无显著性[(χ²=1.665,P=0.645)、(χ^2...     

Diagnostic value of dynamic contrast-enhanced MRI in the salivary gland tumors

To evaluate the diagnostic value of dynamic contrast-enhanced MRI (DCE-MRI) in salivary gland tumors, thirty-five patients (47 lesions) who underwent MR examinations and were histopathologically diagnosed with salivary gland tumors in Okayama University Hospital, between April 1998 and March 2005, were entered in the present study. The parameters included CI(max300) or CI(max600), which was the contrast index (CI) at maximal contrast enhancement upon 300 s or 600 s, and Tmax, which was the time that corresponded to the CI(max300). Washout ratio (WR(300) or WR(600)) was defined as follows: CI(max300)-CI(300s)/CI(max300) or CI(max600)-CI(600s)/CI(max600)x100 (%), where CI(300) or CI(600) was the CI at 300s or 600s after contrast medium administration. We obtained the following results from the analysis of DCE-MRI parameters; (a) The salivary gland tumors were categorized into three CI curve types according to Tmax and WR300; Pleomorphic adenoma; Tmax > 210 s and WR300 < 10%, Warthin tumor; Tmax < 60 s and WR300 > 40%, and malignant tumor; 60s < Tmax < 210 s and 10% < WR300 < 30%; (b) On the basis of the relationship between Tmax and CImax or WR, all pleomorphic adenomas were successfully differentiated from Warthin tumor lesions. Of the 20 pleomorphic adenomas, 18 (90.0%) were successfully differentiated from malignant tumors. All Warthin tumor lesions were successfully differentiated from pleomorphic adenomas and malignant tumors. Of 12 the malignant tumors, 11 (91.7%) were successfully differentiated from pleomorphic adenomas. All malignant tumors were successfully differentiated from Warthin tumors. Thus, DCE-MRI parameters are useful in diagnosing salivary gland tumors on the basis of the combined assessment of Tmax and CImax or WR.     

Comparison of intraductal spread on dynamic contrast-enhanced MRI with clinicopathologic features in breast cancer

OBJECTIVE: Contrast-enhanced magnetic resonance imaging (CE-MRI) has emerged as a new diagnostic technology in various breast cancer treatments. However, little is known about the correlation between intraductal spread on CE-MRI and clinicopathologic features. This study was designed to evaluate these correlations for the surgical planning of breast cancer. METHODS: Twenty-six breast cancer lesions (in 26 female patients) treated by breast conserving surgery between March 2001 and March 2003 were evaluated retrospectively. CE-MRI was performed with a 1.5 T unit using a dedicated bilateral breast coil. RESULTS: In detecting intraductal spread of breast cancer, the sensitivity, specificity and accuracy of CE-MRI were 82.4%, 60.0% and 77.3%, respectively. On mammography (MMG), these were 21.1%, 100.0% and 42.3%, respectively. Therefore, CE-MRI has a higher sensitivity and accuracy, although with a lower specificity than MMG. Compared with breast cancer lesions without intraductal spread on CE-MRI, lesions with intraductal spread on CE-MRI were found more frequently in larger-sized tumors (P = 0.0088). CONCLUSION: Preoperative evaluation for intraductal spread by CE-MRI should be more useful than by MMG for breast cancer. When making the surgical decision regarding excision range, particular attention should be paid to this consideration for patients with larger-sized cancer tumors.     

Doughnut mastopexy lumpectomy versus standard lumpectomy in breast cancer surgery: a prospective study.

AIMS: Doughnut mastopexy lumpectomy (DML) is a unique breast resection in which a tissue segment is removed and the breast reshaped through a periareolar incision. The present prospective investigation compares DML and standard lumpectomy (SL) in relation to surgical variables, histological parameters, postoperative morbidity and cosmetic outcome. METHODS: 127 patients with breast cancer were offered the choice between two conservative surgical approaches: doughnut mastopexy lumpectomy (DML group, n=39) or standard lumpectomy (SL group, n=88). The groups were comparable for radiological tumour size, tumour location within the breast, histological size, and pT category. Comparison was performed in term of surgical variables, histological parameters, postoperative morbidity and cosmetic outcome. RESULTS: The patients undergoing DML were younger than the patients who chose SL. In the DML group, the skin incision was 3-fold longer than in the SL group but was obtained with a final scar located around the nipple areola complex without further postoperative complications. The average volume of the breast specimen was higher in the DML group compared with SL group. The clinician assessment of cosmetic outcome reported a higher rate of acceptable result in the DML group than in the SL group. However, patient's assessment did not show difference of cosmetic satisfaction between groups. CONCLUSION: Our comparative study indicates that DML may be a useful alternative to SL not only in terms of accurate breast tissue resection but also in term of cosmetic results.     

直肠癌血管生成参数及临床病理参数与动态增强磁共振血流灌注参数的相关性

目的:分析动态增强磁共振血流灌注成像（dynamic contrast-enhanced magnetic resonance image,DCE-MRI）参数与直肠癌血管生成参数及临床病理参数的相关性。方法:随机选取2016年2月至2019年1月在我院手术后病理确诊的直肠癌患者58例,术前行DCE-MRI,对肿瘤横断面兴趣区定量检测Ktrans、Ke、Ve和iAUC,术后病理采用Western blot检测血管内皮细胞生长因子（vasular endothelial growth factor,VEGF）表达,免疫组化法检测微血管密度（microvascular density,MVD）,评价Ktrans、Ke、Ve和iAUC在直肠癌临床病理参数［病理分期（T1、T2、T3、T4）、淋巴结转移（阴性vs阳性）、远处转移（阴性vs阳性）、血管浸润（阴性vs阳性）、神经浸润（阴性vs阳性）］中的差异。Pearson Rank相关性方法分析Ktrans、Ke、Ve和iAUC与直肠癌血管生成相关参数VEGF及MVD的相关性。结果:Ktrans及Kep在不同T分期直肠癌中差异有统计学意义（P＜0.001、P＜0.001）,组间比较,Ktrans在T4期高于T3、T2及T1期（P<0.001、P<0.001、P<0.001）,Kep在T4期高于T3、T2及T1期（P<0.01、P<0.001、P<0.001）。Ktrans及Kep在淋巴结转移（阴性vs阳性）、远处转移（阴性vs阳性）、血管浸润（阴性vs阳性）、神经浸润（阴性vs阳性）差异无统计学意义（P均＞0.05）。Pearson Rank相关性分析显示,Ktrans及Kep随着VEGF、MVD水平升高而升高,二者为正相关(P<0.000 1、P<0.000 1);Ve和iAUC与VEGF、MVD水平无相关性(P>0.05、P>0.05)。结论:DCE-MRI参数Ktrans及Kep可对直肠癌血管生成参数及临床病理T分期进行评估,可以作为术前肿瘤生物学行为的预测参数。     

Pretreatment dynamic contrast-enhanced MRI biomarkers correlate with progression-free survival in primary central nervous system lymphoma

Recurrence rates of meningiomas have been widely reported in the literature, but it remains challenging for clinicians to predict recurrence rate depending on treatment, patient demographics and tumor characteristics. To address these needs, we performed a systematic analysis of the literature to determine the recurrence rate ranges of meningiomas following surgery or radiation. Our search yielded 13 studies that met all criteria for inclusion, allowing us to include 1539 patients in the assessment. Recurrence rates ranged from 0.00 to 2.36 per 100-person-years for WHO grade I meningiomas; and from 7.35 to 11.46 per 100-person-years for WHO grade II meningiomas. Our findings suggest that (1) reported recurrence rates are variable and complicated by the heterogeneity of study populations; (2) as expected, WHO grade II meningiomas generally have a higher recurrence rate than WHO grade I, when controlling for time of diagnosis (by employing person-years); and (3) there is a need for more rigorous reporting of recurrence rates, WHO grade, and Simpson grading for individual patients in order to determine a robust mean of recurrence across WHO grades.     

乳腺癌磁共振动态增强扫描影像组学特征与生物学预后因子的关系

目的 探讨乳腺癌磁共振动态增强扫描(DCE-MRI)影像组学特征与生物学预后因子的关系.方法 选取100例乳腺癌患者,所有患者在术前均接受磁共振(MRI)平扫和增强扫描,术中收集患者肿瘤组织,术后采用免疫组织化学染色法检测肿瘤组织中增殖细胞核抗原(Ki-67)、人类表皮生长因子受体2(HER2)、缺氧诱导因子-2α(H...     

基于DWI和DCE-MRI的影像特征对四种不同分子亚型乳腺癌的诊断价值探讨

目的:基于弥散加权成像（diffusion weighted imaging,DWI）和动态增强MRI（contrast-enhancement magnetic resonance imaging,DCE-MRI）的影像特征对Luminal A型、Luminal B型、人类表皮生长因子受体（human epidermal growth factor receptor-2,HER-2）过表达型和三阴型（triple negative,TN）四种不同分子亚型乳腺癌的诊断价值探讨。方法:选取2016年9月至2018年9月我院收治确诊为乳腺癌的患者98例,所有患者行DWI及DCE-MRI扫描,后行乳腺癌手术行病理分子分型鉴定。采用Mann-Whitney U检验和单因素logistic回归法进行各变量单因素分析,采用多因素logistic回归法对单因素分析中有统计学意义的变量进一步分析并建模,使用受试者工作曲线（receiver operating characteristic curve,ROC）评估模型的诊断效能,采用Hosmer-Lemeshow 检验对模型的拟合优度进行检验。结果:患者分子病理分型Luminal A型32例,Luminal B型45例,HER-2过表达型10例,TN型11例。ADC、IER值在鉴别乳腺癌分子分型时AUC＜0.07,诊断效能较低;影像学特征鉴别分子分型时,显示DCE_bior3.1_3_correlation 鉴别 Luminal A型乳腺癌 AUC=0.732;ADC_rbio1.1_1_sum_variance鉴别Luminal B型乳腺癌AUC=0.722;鉴别HER-2过表达型乳腺癌ADC_L_G_2.5_min AUC=0.747;鉴别TN时5个影像学特征AUC 均 >0.70。鉴别Luminal A和非Luminal A型的模型为0.005×ADC_rbio1.1_1_sum_variance+0.032×DCE_bior3.1_3_correlation－0.273;鉴别Luminal B和非 Luminal B型的模型为－0.008×ADC_rbio1.1_1_sum_variance－0.003×DCE_rbio3.1_3_variance+3.204;鉴别 TN和非TN 的模型为-0.163×DCE_L_G_2.5_autocorrelation+8.904,各个鉴别诊断的AUC分别为0.787 6、0.744和0.773。经Hosmer-Lemeshow检验各模型P值均>0.05,各个模型预测值与观测值之间差异无统计学意义,模型拟合效果较好。结论:MRI影像学指标ADC、IER值鉴别乳腺癌分子亚型价值有限,DWI和DCE-MRI相关影像学特征鉴别乳腺癌分子亚型有一定价值。     

Enhancing fraction measured using dynamic contrast-enhanced MRI predicts disease-free survival in patients with carcinoma of the cervix

Background:

There is a need for simple imaging parameters capable of predicting therapeutic outcome.

Methods:

This retrospective study analysed 50 patients with locally advanced carcinoma of the cervix who underwent dynamic contrast-enhanced MRI before receiving potentially curative radiotherapy. The proportion of enhancing pixels (E_F) in the whole-tumour volume post-contrast agent injection was calculated and assessed in relation to disease-free survival (DFS).

Results:

Tumours with high E_F had a significantly poorer probability of DFS than those with low E_F (P=0.011).

Interpretation:

E_F is a simple imaging biomarker that should be studied further in a multi-centre setting.     

The role of heparanase in lymph node metastatic dissemination: dynamic contrast-enhanced MRI of Eb lymphoma in mice

Heparanase expression has been linked to increased tumor invasion, metastasis, and angiogenesis and with poor prognosis. The aim of the study was to monitor the effect of heparanase expression on lymph node metastasis, in heparanase-overexpressing subcutaneous Eb mouse T-lymphoma tumors, and their draining lymph node. Dynamic contrast-enhanced magnetic resonance imaging (MRI) using biotin-BSA-GdDTPA-FAM/ROX was applied for analysis of blood volume, vascular permeability, and interstitial convection, and for detection of very early stages of such metastatic dissemination. Eb tumors increased extravasation, interstitial convection, and lymphatic drain of the contrast material. Interstitial flow directions were mapped by showing radial outflow interrupted in some tumors by directional flow toward the popliteal lymph node. Heparanase expression significantly increased contrast enhancement of the popliteal lymph node but not of the primary tumor. Changes in MR contrast enhancement preceded the formation of pathologically detectable metastases, and were detectable when only a few enhanced green fluorescent protein (EGFP)-expressing Eb cells were found near and within the nodes. These results demonstrate very early, heparanase-dependent vascular changes in lymph nodes that were visible by MRI following administration of biotin-BSA-GdDTPA-FAM/ROX, and can be used for studying the initial stages of lymph node infiltration.     

Leakage decrease detected by dynamic susceptibility-weighted contrast-enhanced perfusion MRI predicts survival in recurrent glioblastoma treated with bevacizumab

Background and purpose

In glioblastoma, tumor progression appears to be triggered by expression of VEGF, a regulator of blood vessel permeability. Bevacizumab is a monoclonal antibody that inhibits angiogenesis by clearing circulating VEGF, resulting in a decline in the contrast-enhancing tumor, which does not always correlate with treatment response. Our objectives were: (1) to evaluate whether changes in DSC perfusion MRI-derived leakage could predict survival in recurrent glioblastoma, and (2) to estimate whether leakage at baseline was related to treatment outcome.

Materials and methods

We retrospectively analyzed DSC perfusion MRI in 24 recurrent glioblastomas treated with bevacizumab as second line chemotherapy. Leakage at baseline and changes in maximum leakage between baseline and the first follow-up after treatment were selected for quantitative analysis. Survival univariate analysis was made constructing survival curves using Kaplan–Meier method and comparing subgroups by log rank probability test.

Results

Leakage reduction at 8 weeks after initiation of bevacizumab treatment had a significant influence on overall survival (OS) and progression-free survival (PFS). Median OS and PFS were 2.4 and 2.8 months longer for patients with leakage reduction at the first follow-up. Higher leakage at baseline was associated with leakage reduction after treatment. Odds ratio of treatment response was 9 for patients with maximum leakage at baseline >5.

Conclusions

Leakage decrease may predict OS and PFS in recurrent glioblastomas treated with bevacizumab. Leakage reduction postulates as a potential biomarker for treatment response evaluation. Leakage at baseline seems to predict response to treatment, but was not independently associated with survival.

     

动态对比增强磁共振成像感兴趣区勾画技术在乳腺癌诊断中的临床研究

背景与目的：动态对比增强磁共振技术(dynamic contrast enhanced MRI,DCE-MRI)在乳腺肿瘤良恶性鉴别诊断及新辅助化疗疗效评价中具有重要的临床价值,然而尚无标准定量测量方法。该研究旨在探讨DCE-MRI感兴趣区(region of interest,ROI)勾画技术在乳腺癌诊断中的临床研究,寻找最佳ROI勾画方法。方法：回顾性分析了经手术和病理证实的30例乳腺癌患者的动态对比增强MRI影像,分别由2位观察者利用iCAD软件,通过全部瘤床勾画(Whole)、最大强化层面勾画(SliceMax)、含最大强化层面连续3层勾画(Partial)和最大强化层面5%连续强化区勾画(5Max)等4种方法勾画乳腺癌瘤床ROI,获得不同ROI下相应的容量转移常数(volume transfer constant,K^trans)、细胞外间隙容积比(extracellular volume fraction,V_e)和速率常数(rate constant,K_ep),评价4种勾画方法观察者内及观察者间测量的一致性。结果：30例乳腺癌瘤床的ROI勾画方法中,两位不同观察者Whole法的K^trans、V_e和K_ep分别为1.26±0.54和1.25±0.53、0.75±0.23和0.73±0.22、1.93±1.46和1.95±1.51(P>0.05);Partial法为1.28±0.43和1.26±0.43、0.74±0.21和0.80±0.27、1.95±1.53和1.93±1.43(P>0.05);SliceMax法为1.30±0.33和1.32±0.33、0.77±0.20和0.73±0.24、1.82±1.53和1.87±1.45(P>0.05);5Max法为1.31±0.35和1.35±0.33、0.77±0.20和0.98±0.25、1.97±1.36和1.73±1.55(P<0.05)。4种ROI勾画方法中除5Max方法外,不同观察者利用其他3种勾画方法测量所得功能参数K^trans、V_e和K_ep之间相比差异无统计学意义(P>0.05),5Max测量方法测量所得参数与其他3种方法相比差异有统计学意义(P<0.05)。利用Bland-Altman方法评价功能参数Ktrans观察者间一致性,得出Whole法、SliceMax法、Partial和5Max方法下测量偏倚及95%CI分别为0.002 vs-0.013~0.012、-0.003 vs -0.023~0.017、0.006 vs -0.018~0.029、-0.035 vs -0.054~0.018。结果提示前3种方法观察者间具有较好的一致性。结论：乳腺癌瘤床DCE-MRI不同ROI勾画技术中,Whole法、Partial法和SliceMax法均能获得良好的观察者内及观察者间一致性,适合推广应用。     

Randomized prospective trial of fractionated stereotactic radiosurgery with chemotherapy versus chemotherapy alone for bevacizumab-resistant high-grade glioma

Journal of Neuro-Oncology - Outcomes for patients with recurrent high-grade glioma (HGG) progressing on bevacizumab (BEV) are dismal. Fractionated stereotactic radiosurgery (FSRS) has been shown to...     

动态增强MR成像在孤立型肺结节中的应用

Objective:The aim of our study was to investigate the value of dynamic contrast-enhanced MRI for evaluating differential diagnosis of pulmonary isolated lesions.Methods:Twenty-nine consecutive patients enrolled in this study,all of whom underwent DCE-MRI examinations and received a histologic and clinical diagnosis.Among these,lung tuberculoma 7 cases,harmatoma 3 cases,peripheral lung cancer 19 cases.DCE-MRI was acquired with 3D LAVA technique,total 18 phases were acquired,scanner time of per phase was 5-7".After contrasting agent,twice successive scanning was acquired at 10" and 50".Then 1'30",2',2'30",3',3'30",4',5',6',7',8',9',10',11',12' performed scanning.Region of interest was placed on the Maximum level in the tumors.According to Schaefer's standard,four types of time signal intensity curve(TIC)were classified,which were A,B,C and D.Compared the dynamic parameters between benign and malignant nodules.Results:Lung tuberculoma may display three curves:A type 1 case,ring-shaped enhancement 4 cases(periphery ring A type,central region D type),D type 2 cases.Harmatoma may display three curves:A type 1 case,C type 2 case.Peripheral lung cancer may display A type.Except 2 cases D type lung tuberculoma,we compared curve data of 8 cases benign nodules(including tuberculoma A type and periphery ring A type,harmatoma A type and C type)and lung cancer.SIEP%:benign nodules 0.7885+0.5543,lung cancer 1.2623+0.3059,P＜0.05;MER:benign nodules 1.0007+0.4251,lung cancer 1.3694+0.2740,P＜0.05;washout:P>0.05.Conclusion:Lung MR imaging is helpful to diagnosis and differential diagnosis of isolated benign and malignant nodules.SIEP% and MER could offer valuable information.The evolution of global tuberculosis may be from A type to ring-shaped ennoblement to D type.It was easy to do right diagnosis to lung tuberculoma with ring-shaped ennoblement and D type.Peripheral lung cancer commonly displayed A type and needed identification with acute inflammation.So,it is important to anti-inflammatory follow-up for a few A type nodules.