| 张佳,张洪,张振光,曾小敏,严俊,薛凤麟,何波.胸腺瘤的MRI表现[J].中国医学影像技术,2019,35(5):701~705 |
| 胸腺瘤的MRI表现 |
| MRI manifestations of thymoma |
| 投稿时间：2018-10-22 修订日期：2019-03-15 |
| DOI：10.13929/j.1003-3289.201810117 |
| 中文关键词: 胸腺瘤 磁共振成像 诊断显像 |
| 英文关键词:thymoma magnetic resonance imaging diagnostic imaging |
| 基金项目: |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 T2WI, 20 showed low/medium signals on T1WI. 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. |
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