摘要
目的分析胸腺瘤的MRI表现。方法收集经病理证实并有完整影像学资料的29例胸腺瘤患者,分析平扫、DWI及增强扫描MRI表现,并根据病理结果分为低危组(n=18)和高危组(n=11),分析其影像学表现的差异。结果肿瘤均为单发,28例病灶位于前纵隔,1例位于左锁骨上窝;21例肿瘤形态不规则,21例与邻近结构分界清楚。24例病灶T2WI呈高/稍高信号;20例T1WI呈低—中等信号;9例病变内有囊变坏死,7例可见分隔,1例可见液平;全部病灶DWI呈均匀或混杂信号。9例病灶增强扫描轻度强化,11例中度强化,9例明显强化。低危组与高危组ADC值差异无统计学意义(P=0.42)。结论胸腺瘤常规MRI及DWI表现有一定特征性,有助于术前诊断胸腺瘤。
Objective To analyze MRI manifestations of thymoma. Methods Twenty-nine patients with thymoma confirmed by pathology and complete imaging data were collected. Nonenhance MRI, DWI and enhanced imaging were analyzed. The patients were divided into low-risk group(n=18) and high-risk group(n=11) according to pathology. The differences of imaging manifestations between the two groups were analyzed. Results Totally 28 lesions located in the anterior mediastinum and 1 in the left supraclavicular fossa. The tumors were solitary, 21 were irregular in shape, whereas 21 were clearly demarcated from the adjacent structures. Among them 24 lesions showed high/slightly high signals on T2 WI, 20 showed low/medium signals on T1 WI. There were 9 cases with cystic necrosis, 7 cases with separator line, and 1 case with liquid level. DWI of all lesions showed uniform or mixed signals. Enhanced images showed 9 lesions mildly enhanced, 11 lesions enhanced moderately, 9 lesions markedly enhanced. There was no significant difference of ADC values between low-risk group and high-risk group(P=0.42). Conclusion Routine MRI and DWI findings of thymoma have some characters, which are helpful to preoperative diagnosis of thymoma.
作者
张佳
张洪
张振光
曾小敏
严俊
薛凤麟
何波
ZHANG Jia;ZHANG Hong;ZHANG Zhenguang;ZENG Xiaomin;YAN Jun;XUE Fenglin;HE Bo(Department of Medical Imaging,the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China;Department of Pathology, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China)
出处
《中国医学影像技术》
CSCD
北大核心
2019年第5期701-705,共5页
Chinese Journal of Medical Imaging Technology
关键词
胸腺瘤
磁共振成像
诊断显像
thymoma
magnetic resonance imaging
diagnostic imaging
