MRI manifestations of thymoma
10.13929/j.1003-3289.201810117
- Author:
Jia ZHANG
1
Author Information
1. Department of Medical Imaging, the First Affiliated Hospital of Kunming Medical University
- Publication Type:Journal Article
- Keywords:
Diagnostic imaging;
Magnetic resonance imaging;
Thymoma
- From:
Chinese Journal of Medical Imaging Technology
2019;35(5):701-704
- CountryChina
- Language:Chinese
-
Abstract:
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.
