The role of high resolution diffusion-weighted imaging and dynamic contrast-enhanced MRI in the evaluation of sinonasal rhahdomyosarcoma
HUANG Hong-yan1, HUANG Wen-hu2, SHU Jin-er1, WANG Feng2
1. Department of Radiology, Jinhua Hospital of Zhejiang University, Jinhua Zhejiang 321000, China;
2. Department of Radiology, Eye Ear Nose and Throat Hospital of Fudan University, Shanghai 200031, China
Abstract：Objective: To identify MR imaging features of sinonasal RMS, including high resolution diffusion weighted imaging(DWI) and dynamic contrast-enhanced(DCE) MRI. Materials and Methods: MRI and clinical data of 15 patients were analyzed retrospectively． Imaging features of conventional MR(non-enhanced and dynamic contrast-enhanced), the ADC values and DCE-MRI parameters(n=8) were analyzed. The semiquantitative parameters included Tpeak, ERmax, Slopemax and WR. Results: In the 15 cases of RMS, 12 were unilateral while the other 3 were bilateral, including 10 in the ethmoid sinus, 3 in the maxillary sinus, and 2 in the multi-paranasal sinus． The lesions were invasive, destructive or expansive. Compared with gray matter, 10 of the tumors showed hypointensity and 5 showed isointensity on T1WI. And 15 demonstrated hyperintensity on T2WI． There were multiple linear high signals on T1WI and high or low signal on T2WI within the mass in 8 of the 15 tumors. Evaluated with gadolinium-enhanced imaging, 3 patients showed clustered enhancement while 5 patients showed ring or linear enhancement. The mean ADC value was (0.59±0.08)×10-3 mm2/s. The time-intensity curve(TIC) of DCE-MRI showed rapid enhancement and slow wash out in 6 cases, rapid enhancement and rapid wash out in 2 cases. Tpeak was (69.1±13.3), and WR was (2.2±0.5)%. Conclusions: Combined with conventional imaging, high resolution diffusion-weighted imaging and dynamic contrast-enhanced MRI have the potential to improve the diagnostic accuracy of sinonasal RMS.
黄红艳1，黄文虎2，舒锦尔1，王 凤2. MRI高清弥散加权成像及动态增强对鼻腔鼻窦横纹肌肉瘤的诊断价值[J]. 中国临床医学影像杂志, 2016, 27(12): 850-854.
HUANG Hong-yan1, HUANG Wen-hu2, SHU Jin-er1, WANG Feng2. The role of high resolution diffusion-weighted imaging and dynamic contrast-enhanced MRI in the evaluation of sinonasal rhahdomyosarcoma. JOURNAL OF CHINA MEDICAL IMAGING, 2016, 27(12): 850-854.
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