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• Clinical Article •
A preliminary investigation of MRI categorization of thymic tumors
LING Hao  XI Xiaoxu  LI Menglu  LI Jie  CHENG Liuquan 

Cite this article as: Ling H, Xi XX, Li ML, et al. A preliminary investigation of MRI categorization of thymic tumors. Chin J Magn Reson Imaging, 2020, 11(8): 641-646. DOI:10.12015/issn.1674-8034.2020.08.009.


[Abstract] Objective: To explore the categorization of thymic tumors on MRI by using the similar mode of BI-RADS in breast diseases.Materials and Methods: From May 2014 to August 2018, 85 cases of pathologically confirmed thymic tumors were examined by MRI. The lesions were categorized into Ⅰ—Ⅴ according to signal patterns and their morphological features with reference to WHO histopathological classification and Masaoka-Koga staging.Results: MRI categorization was well consistent with WHO classification and Masaoka-Koga staging. Of 85 cases of thymic tumors, 15/16 cases of thymic cysts were category Ⅱ, indicating benign lesions; 2/3 cases of benign thymic hyperplasia, 4 cases of type A, 15/17 cases of AB type, 14/17 case B1 thymomas were category Ⅲ, indicating low-risk lesions; 5/6 cases of type B2 and 6 cases of type B3 thymoma were category Ⅳ, indicating high-risk lesions; 9/11 cases of thymic carcinoma were category Ⅴ, indicating invasive malignant lesions. The spearman correlation coefficient was 0.808, where t=12.499 and P<0.01.Conclusions: On the multiparametric MRI, the thymic tumors could be categorized into Ⅰ—Ⅴ as BI-RADS in breast lesions, which was well correlated to the WHO histopathological classification and the Masaoka-Koga staging and was helpful for the diagnosis and treatment plan of thymic lesions.
[Keywords] thymic neoplasms；magnetic resonance imaging；classification；staging

LING Hao Department of Radiology, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China; Department of Radiology, University of South China Affiliated Changsha Central Hospital, Changsha 410004, China

XI Xiaoxu Department of Radiology, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China

LI Menglu Department of Radiology, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China

LI Jie Department of Thoracic Surgery, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China

CHENG Liuquan* Department of Radiology, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China

*Corresponding to: Cheng LQ, E-mail:cheng_liuquan@139.com

Conflicts of interest   None.

Received  2020-01-07
Accepted  2020-04-19
DOI: 10.12015/issn.1674-8034.2020.08.009
Cite this article as: Ling H, Xi XX, Li ML, et al. A preliminary investigation of MRI categorization of thymic tumors. Chin J Magn Reson Imaging, 2020, 11(8): 641-646. DOI:10.12015/issn.1674-8034.2020.08.009.

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