肺癌合并垂体转移瘤的影像学表现

Imaging features of lung cancer with pituitary metastasis

目的:探讨肺癌合并垂体转移瘤的CT、MRI表现特征,以提高鉴别诊断水平。方法:对6例确诊为肺癌并伴有垂体转移的患者,其中5例进行颅脑CT扫描,3例进行颅脑MRI扫描。结果:CT平扫表现为鞍区高、略高或等密度占位病灶。MRI表现为转移灶位于垂体后叶和(或)垂体柄,呈浸润性生长,T1WI以低信号为主,T2WI呈等、略高信号,信号可不均匀;多层螺旋CT(multipleslice spiral CT,MSCT)矢状位重建及MRI矢状位显示病灶为典型的"哑铃状"表现,增强扫描病灶呈中度及明显的均匀或不均匀强化。结论:垂体转移瘤的CT及MRI影像学表现有一定的特征性,CT和(或)MRI检查对垂体转移瘤的诊断与鉴别诊断具有重要的参考价值。

Objective： To investigate the CT and MRI features of lung cancer with pituitary metastasis to increase the level of differentiation diagnosis. Materials：Six patients were confirmed with lung cancer accompanied with pituitary metastasis. CT scanning was performed in 5 cases and MRI was performed in 3 cases. Results： Plain CT scanning indicated space-occupying lesions with hyper, slightly hyper or iso-density in sellar area. MRI displayed that pituitary metastases were located in the posterior lobe and/or pituitary stalk and showed infiltrative growth patterns. T1WI signal exhibited hypointensity signals and T2WI presented isodensity or hyperdensity signals. The signals were inhomogeneons. Mnltipleshice spiral CT （MSCT） sagittal reconstruction and MRI sagittal imaging showed that the lesions were in dumbbell shape and the enhanced scanned lesions had moderate and apparent homogenous or inhomogenous enhancement. Conclusion ：The CT/MRI imaging of pituitary metastases had certain features. CT and/or MRI had important values for the diagnosis and differentiation diagnosis of pituitary metastases.