成人型弥漫性胶质瘤术前MRI增强等级影响IDH突变和WHO分级

Preoperative MRI enhancement grade for adult diffuse glioma affects IDH mutation and WHO grade

目的分析成人型弥漫性胶质瘤的临床特征和磁共振成像(magnetic resonance imaging,MRI)特征,定义成人型弥漫性胶质瘤术前MRI增强等级(ET等级),并探究ET等级与异柠檬酸脱氢酶(isocitrate dehydrogenase,IDH)突变和WHO分级之间的关系。方法回顾性分析2018年1月至2023年12月我院经手术病理证实的306例成人型弥漫性胶质瘤患者的临床数据,其中IDH突变型169例,IDH野生型137例。分析两种IDH状态患者性别、年龄、MRI信号是否均匀、肿瘤边界是否清晰、水肿是否明显、邻近脑室受压情况和ET等级方面的差异,建立logistic回归模型,找出影响IDH突变的独立影响因素,并分析ET等级与IDH状态和WHO分级之间的相关性。结果IDH不同状态患者在年龄、MRI信号是否均匀、肿瘤边界是否清晰、水肿是否明显、邻近脑室受压情况和ET等级方面的差异具有统计学意义。通过Forward法筛选自变量纳入Logistic回归模型,ET等级、年龄和边界是IDH突变状态的独立影响因素,并且与IDH突变呈负相关。年龄每增加1岁,IDH突变型成人型弥漫性胶质瘤的概率减少0.93倍。建立的回归模型预测IDH状态的准确性为0.859,敏感度为0.852,特异度为0.869,AUC为0.922(0.892~0.952)。ET等级与WHO分级显著相关,在WHO 2级脑胶质瘤患者中占比最突出的是noET,在WHO 3级脑胶质瘤患者中占比最突出的是ET2,在WHO 4级脑胶质瘤患者中占比最突出的是ET3。结论成人型弥漫性胶质瘤患者术前MRI的ET等级与IDH突变状态呈负相关,与WHO分级呈正相关,ET等级有助于IDH突变状态和WHO分级的判定。

Objective To analyze the clinical features and magnetic resonance imaging(MRI)features of adult diffuse glioma,define the preoperative MRI enhancement grade(ET grade)of the disease,and explore the relationship of ET grade with isocitrate dehydrogenase(IDH)mutation and WHO grade.Methods The clinical data of 306 cases of adult diffuse glioma confirmed by surgery and pathology admitted in our hospital from January 2018 to December 2023 were collected and retrospectively analyzed.There were 169 cases of mutant IDH and 137 cases of wildtype IDH.The differences in gender,age,MRI signal uniformity,clear tumor margin,obvious edema,compression of adjacent ventricles and ET grade were analyzed between the 2 types of IDH patients.A logistic regression model was established to identify the independent influencing factors for IDH mutation,and the correlation of ET grade with IDH status and WHO grade was analyzed.Results There were significant differences in age,whether the MRI signal was uniform,whether the tumor margin was clear,whether the edema was obvious,the compression of the adjacent ventricle and the ET grade in patients with different IDH status.The independent variables were screened by Forward method and then included in the logistic regression model.ET grade,age and tumor margin were independent influencing factors of IDH mutation status and negatively correlated with IDH mutation.For every 1 year increase in age,the probability of mutant IDH in adult diffuse glioma was decreased by 0.93 times.The accuracy of the established regression model for predicting IDH status was 0.859,the sensitivity was 0.852,the specificity was 0.869,and the AUC value was 0.922(0.892~0.952).ET grade was significantly correlated with WHO grade.The most prominent proportion of glioma patients with WHO grade 2 was noET,that with WHO grade 3 was ET2,and that with WHO grade 4 was ET3.Conclusion For adult diffuse glioma,preoperative MRI ET grade is negatively correlated with IDH mutation status,and positively with WHO grade.ET grade is helpful for determination of of IDH mutation status and WHO grade.