纵隔神经源性肿瘤MRI的诊断价值

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Abstract Objective: To analyze the characteristics of MRI scan signal for mediastinal neurogenic tumors in order to enhance the understanding and diagnostic accuracy of the disease. Methods: There were 33 cases which were pathologically identified as mediastinal neurogenic tumors. Spin echo T1WI, fast spin echo T2WI, breath spoiled gradient echo T1WI MRI were used and retrospectively analyzed. Results: Among the 33 cases of mediastinal neurogenic tumor, there were 18 cases of neurilemmoma, ganglioneuroma in 7 cases, neurofibroma in 5 cases and 3 cases of paraganglioma. The boundary of the tumors was clear, mostly were round or oval. Through MRI scan, T1WI showed homogeneously low signal; T2WI showed slightly higher signal; the rest of the neurogenic tumors showed inhomogeneously high signal. Through dynamic enhanced scan, 10 cases of neurilemmoma were inhomogeneous slight enhancement in arterial phase and showed inhomogeneous delayed enhancement obviously in venous phase. Three cases of neurilemmoma were inhomogeneous enhancement obviously in arterial phase and showed continuous enhancement obviously in venous phase. Neurofibroma was homogeneous slight enhancement in arterial phase and showed even delayed enhancement obviously in venous phase. Ganglioneuroma showed slight and moderate homogeneous delayed enhancement. Paraganglioma showed inhomogeneous enhancement obviously in arterial phase and low enhancement in venous phase. Conclusion: MRI symptoms of mediastinal neurogenic tumors have some specific characteristics, which could be helpful for the correct diagnosis before operation.

Key words： Mediastinal neoplasms Magnetic resonance imaging

Received: 23 May 2016

PACS:
	Ｒ734.5
	Ｒ445.2

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	Articles by authors
	LIU Wen-fei1
	JIN Hang2
	WU Jian-lin1
	YU Jing1

Cite this article:

LIU Wen-fei1,JIN Hang2,WU Jian-lin1, et al. Diagnostic value of MRI for mediastinal neurogenic tumors[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2017, 28(2): 101-104.

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http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2017/V28/I2/101

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