Abstract：Objective: To evaluate the value of diffusion weighted imaging(DWI) and dynamic contrast enhanced MR imaging combined with conventional MR imaging(MRI) in the diagnosis of Kimura disease(KD). Methods: The clinical data and MRI findings of 7 patients with KD located in parotid glands proven by histopathologic examination were retrospectively analyzed. Results: Two patients had bilateral onset and 5 patients had unilateral onset. According to the shape of the lesion and the involved tissues, they were divided into 3 types: type Ⅰ(3 cases): subcutaneous lesions diffuse infiltration to the parotid gland; type Ⅱ(3 cases): intraparotid lymphadenopathies; type Ⅲ(1 case): mixed mode. On plain scan, type Ⅰ showed equal signal on T1WI, mixed slightly high signal on T2WI; type Ⅱ showed equal signal on T1WI, slightly high signal on T2WI in 2 cases, equal signal in 1 case; type Ⅲ showed slightly high signal on T1WI, mixed slightly high signal on T2WI. Dynamic enhanced MRI scan showed progressive enhancement of subcutaneous infiltration to parotid gland lesions, and early enhancement of reactive lymph nodes. The ADC value of normal parotid gland was (0.89±0.06)×10-3 mm2/s, that of subcutaneous infiltration to parotid gland lesions was (1.24±0.10)×10-3 mm2/s, and that of reactive lymph nodes was (0.62±0.06)×10-3 mm2/s. Conclusions: The ADC values of subcutaneous infiltration to parotid lesions were higher than those of normal parotid glands, and the ADC values of reactive lymph node lesions were lower than those of normal parotid glands. On dynamic enhanced scan, infiltrative parotid gland lesions showed progressive enhancement, and the parotid gland lymph nodes and reactive lymph nodes showed early enhancement. These features can be used as characteristic MR manifestations of KD, combined with its clinical manifestations and laboratory examinations, can highly suggest the diagnosis of KD.
马可燃，程敬亮，张晓楠，王斐斐，宋承汝. 腮腺木村病的DWI和动态增强MR表现[J]. 中国临床医学影像杂志, 2019, 30(4): 242-245.
MA Ke-ran, CHENG Jing-liang, ZHANG Xiao-nan, WANG Fei-fei, SONG Cheng-ru. DWI and dynamic contrast-enhanced MR imaging of Kimura disease in parotid glands. JOURNAL OF CHINA MEDICAL IMAGING, 2019, 30(4): 242-245.
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