Freling N J, Molenaar W M, Vermey A, Mooyaart E L, Panders A K, Annyas A A, Thijn C J
Department of Radiology, University Hospital Groningen, The Netherlands.
Radiology. 1992 Dec;185(3):691-6. doi: 10.1148/radiology.185.3.1438746.
Magnetic resonance (MR) imaging was performed in 116 patients in whom a parotid mass lesion was clinically suspected. Eighty-six patients had benign disease. The 30 patients in whom a malignant tumor was found were further evaluated. To determine which features are characteristic of malignant parotid tumors, spin-echo T1- and T2-weighted images of malignant lesions in the parotid gland were compared with those of benign disease. In our series, tumor margins, homogeneity, or signal intensity were not discriminative factors to correctly predict benign or malignant disease. Infiltration into deep structures (eg, the parapharyngeal space, muscles, and bone) was observed only in malignant tumors. Infiltration into subcutaneous fat was noticed in malignant as well as in inflammatory disease. No statistically significant correlation was found between tumor grade and MR imaging features in malignant disease. MR imaging is useful in delineating malignant tumors but is unreliable in correctly predicting the histologic nature of a mass lesion in the parotid gland.
对116例临床怀疑患有腮腺肿块病变的患者进行了磁共振（MR）成像检查。86例患者患有良性疾病。对发现患有恶性肿瘤的30例患者进行了进一步评估。为了确定哪些特征是腮腺恶性肿瘤的特征，将腮腺恶性病变的自旋回波T1加权和T2加权图像与良性疾病的图像进行了比较。在我们的系列研究中，肿瘤边缘、均匀性或信号强度不是正确预测良性或恶性疾病的鉴别因素。仅在恶性肿瘤中观察到向深部结构（如咽旁间隙、肌肉和骨骼）的浸润。在恶性肿瘤以及炎症性疾病中均发现有向皮下脂肪的浸润。在恶性疾病中，未发现肿瘤分级与MR成像特征之间存在统计学上的显著相关性。MR成像有助于勾勒恶性肿瘤，但在正确预测腮腺肿块病变的组织学性质方面并不可靠。
