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目的:探究乳腺导管原位癌(DCIS)的MRI形态及动态增强表现,提高术前诊断的准确性。方法:选择35例经手术证实患有乳腺导管原位癌的受检者,均已在术前7天对患者进行MRI检查。回顾性分析受检者术前MRI的病灶分布形式和内部强化特征,将资料分为浸润性乳腺导管原位癌组与非浸润性乳腺导管原位癌组,最后对MRI形态及动态增强表现进行分析、评估、统计、分析、整理。结果:共检查出36个乳腺导管原位癌病灶,其中斑点状2个、非肿块样32个、肿块样病灶2个,三种乳腺导管原位癌病灶检出率比较,存在显著统计学差异(p<0.05)。在32个非块样强化的病灶中导管分支样7个、段样17个、局灶性4个、区域性3个,其中以导管分支样、段样最常见;浸润性乳腺导管原位癌组中导管分支样3个、段样10个、局灶性3个、区域性1个;非浸润性乳腺导管原位癌组导管分支样4个、段样6个、局灶性1个、区域性1个。TIC的11个病灶中持续上升型4个、平台型5个、廓清型1个、与腺体同步强化型1个。结论:由以上结果可以看出,非块样强化是乳腺导管原位癌MRI形态的主要表现,其中最常见的是导管分支样与段样,TIC以持续上升型与平台型居多。
Objective: To investigate the MRI features and dynamic enhancement of ductal carcinoma in situ (DCIS) and to improve the accuracy of preoperative diagnosis. Methods: Totally 35 subjects surgically confirmed as having ductal carcinoma in situ were examined by MRI. All patients underwent MRI examination 7 days before operation. The distribution of lesions and internal enhancement features of the preoperative MRI were retrospectively analyzed. The data were divided into invasive ductal carcinoma in situ and non-invasive ductal carcinoma in situ. Finally, the morphology and dynamic enhancement of MRI were performed Analysis, evaluation, statistics, analysis, finishing. Results: Thirty-six breast ductal carcinoma in situ were detected, including 2 spots, 32 non-tumorous masses and 2 mass-like lesions. The detection rates of the three kinds of ductal carcinoma in situ were significantly different (p <0.05). Among the 32 non-patch-like lesions, there were 7 branches, 17 segments, 4 focal and 3 regional ones, of which the branches were the most common and the most common ones were invasive ductal carcinoma in situ In the group, there were 3 branches, 10 segments, 3 focal and 1 regional. In non-invasive ductal carcinoma in situ, there were 4 branches, 6 segments, 1 focal, Regional 1. Of the 11 lesions of TIC, 4 were continuously ascending type, 5 as platform type, 1 as clearing type and 1 as synchronous enhancement type as glands. Conclusion: From the above results, it can be seen that non-patch-like enhancement is the main manifestation of MRI in ductal carcinoma in situ. The most common one is the branching and segmenting of catheters. The TIC is continuously rising and platform-type.