肾脏及肾周占位性病变的MRI诊断(附21例分析)

MRI Diagnosis of Space-Occupying Lesions in Kidney and Its Periphery: Preliminary Analysis of 21 cases

目的:分析肾脏与肾脏周围占位性病变的MRI信号特征及其诊断价值。材料与方法:21例肾与肾周占位病变患者均经PHILIP 1.0NT型MR机行常规横断面T_1WI和T_2WI检查,加扫冠状位T_1W及冠状位T_2W压脂,MRI诊断结果经病理证实。结果:神经母细胞瘤1例,病灶呈长T_1,长T_2信号,内有坏死、囊变、出血;肾透明细胞癌3例,病灶呈等T_1、等T_2信号,有假包膜征;血管肌脂肪瘤2例,病灶呈短T_1长T_2信号;纤维组织细胞瘤1例,病灶呈稍长T_1、长T_2信号,形态不规则或分叶状;肾血管瘤14例,病灶呈长T_1、长T_2信号,分叶状。结论:肾与肾周占位病变MRI检查具有特异性,MRI信号反映了占位病变的组织成分,从而可准确显示病变部位,并能做出定性诊断。

Purpose: To analyze MRI signal features of the masses in kidney and its periphery and its roles in the diagnosis. Materials and Methods: Twenty - one patients with mass in kidney and its periphery underwent conventional T1W and T2W MR imaging in cross - section and T1W and T2 W fat suppression in coronal scan. The diagnostic results from MRI were proved by postoperative pathology. Results: Of the 21 patients, one was neuroblastoma in which MRI findings were hypointensity on T1WI and hyperintensity on T2WI, companied with intratumor necrosis, cystiform change and hemorrhage; three were renal clear cell carcinomas in which MRI findings were isointensity on T1WI and T2WI, companied with pseudocapsul sign; two were hemangioleiomyolipomas in which MRI findings were hyperintensity on T1WI and T2WI; one was fibro - histocytoma in which MRI findings were slightly hypointensity on T1WI and hyperintensity on T2WI, the tumor form was irregulary or lobulated; fourteen were renal hemangioma in which MRI findings were hypointensity on T1WI and hyperintensity on T2WI, companied with loulated. Conclusions: For different masses in kidney and its periphery, their MRI signals had various manifestations, i. e. the signal represented the tissue components from different tumors, therefore, it can accurately determine the location of masses and make the correct diagnosis.