恶性外周神经鞘膜瘤的MRI征象

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Abstract Objective: To explore the typical and common MRI features of malignant peripheral nerve sheath tumor(MPNST) in order to improve the preoperative diagnostic accuracy． Methods: A total of 26 patients MRI with MPNST confirmed by pathology were analyzed retrospectively(n=26, 20 patients underwent enhanced scan). Results: ①Typical features: atypical“target sign”(n=12), 9 cases in the limbs, 2 cases in lumbar spinal canal, 1 case in the soft tissues around the hip joint； “entering or exiting nerve sign”(n=6), all were located in the region of the sciatic nerve; “fascicular sign”(n=6), all were located in the limbs. ②Dynamic enhancement modes: 8 lesions(40%) showed type Ⅱ, 10 lesions(50%) showed type Ⅰ, the solid parts showed annular or patchy or nodular inhomogeneous enhancement; 2 lesions(10%) showed type Ⅲ　enhancement, the solid parts showed homogeneous enhancement.③Common features: 2 cases showed irregular shape, rough edge, 14 cases showed regular shape, smooth edge; Five cases did not infiltrate to the soft tissue, 21 cases were infiltrative; Twenty-two cases(84.6%) T1WI showed equal or low signal, 25 cases(96.2%) T2WI showed equal ormixed high signal. Conclusion: There were typical MRI features in most of the MPNST, the special signs such as atypical “target sign”, “entering or exiting nerve sign”, “fascicular sign”, the type　Ⅰ, type　Ⅱ dynamic enhancemant modes have helpful to make the diagnosis．

Key words： Nerve sheath tumors Magnetic resonance imaging

Received: 10 April 2017

PACS:	Ｒ730.264
	Ｒ445.2

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	Articles by authors
	WANG Qian
	REN Cui-ping
	WANG Shan
	LI Fei
	SUN Nan
	CHENG Jing-liang

Cite this article:

WANG Qian,REN Cui-ping,WANG Shan, et al. MRI features of malignant peripheral nerve sheath tumor[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2018, 29(2): 121-125.

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http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2018/V29/I2/121

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