Teresi L M, Lufkin R B, Wortham D G, Abemayor E, Hanafee W N
Radiology. 1987 May;163(2):405-9. doi: 10.1148/radiology.163.2.3562818.
Over a 2-year period 20 patients who presented with masses in the parotid gland were evaluated with magnetic resonance (MR) imaging. T1-weighted images were obtained on a high-resolution, thin-section MR imaging system. When "cystic-appearing" lesions were found, T2-weighted images were obtained in order to better characterize the tumor. As in other areas of the body, MR images of parotid tumors are not usually histologically specific. MR findings may be distinctive in rare cases and define the internal architecture of complex parotid masses. Although poor tumor margination was a clue to malignancy, this was not a consistent finding. The real advantage of MR imaging in evaluating parotid masses was its ability to accurately reveal the extraparotid or intraparotid location of a tumor and demonstrate the relationship of the tumor to the facial nerve. Small and medium-sized mass lesions could be seen as superficial or deep to the facial nerve. Larger masses producing some distortion of the normal course of the nerve made identification of the nerve more difficult, if not impossible. In malignant tumors with gross invasion of the facial canal, MR images can show the extent of nerve involvement.
在两年时间里，对20例腮腺出现肿块的患者进行了磁共振（MR）成像评估。在高分辨率、薄层MR成像系统上获取T1加权图像。当发现“似囊肿”病变时，获取T2加权图像以更好地对肿瘤进行特征描述。与身体其他部位一样，腮腺肿瘤的MR图像通常在组织学上不具有特异性。MR表现可能在罕见情况下具有独特性，并能界定复杂腮腺肿块的内部结构。尽管肿瘤边缘不清是恶性肿瘤的一个线索，但这并非始终如此。MR成像在评估腮腺肿块方面的真正优势在于其能够准确显示肿瘤在腮腺外或腮腺内的位置，并展示肿瘤与面神经的关系。中小尺寸的肿块病变可显示在面神经的浅面或深面。较大的肿块若使神经正常走行出现一些扭曲，则即便有可能也会使神经的识别更加困难。在面神经管受到大体侵犯的恶性肿瘤中，MR图像可显示神经受累的程度。
