多房囊性肾癌的CT、MRI征象分析

CT and MRI Features of Multilocular Cystic Renal Cell Carcinoma

目的探讨多房囊性肾癌的CT及MRI特点,提高对多房囊性肾癌诊断正确率。方法回顾性分析23例经手术病理证实的多房囊性肾癌患者的CT、MRI及相关临床资料。结果 23例共23个病灶。病变位于右肾13例,左肾10例。23例均显示肿块为边界光滑、多房囊性病灶,囊壁及分隔厚薄不均。14例伴附壁结节,3例见囊壁钙化,增强后囊壁、分隔和壁结节有强化,5例诊断囊性占位患者随访观察中出现囊壁增厚、出现分隔、囊液密度增高等征象,最终证实为多房囊性肾癌。结论多房囊性肾癌的影像学表现具有一定的特征性,CT及MRI检查对提高其术前诊断正确率具有重要的临床意义,肾囊性占位随访观察中出现囊壁、分隔增厚等改变提示恶性可能。

Objective To explore CT and MRI imaging features of muhilocular cystic renal cell carcinoma （MCRCC） to improve its diagnostic accuracy. Methods CT and MRI imaging data of 23 cases with MCRCC confirmed by operation and pathology were retrospectively analyzed. Results 23 lesions were found in 23 patients. 13 lesions in the right kidney and 10 in the left kidney. All the lesions were composed of smooth sharp border, multiple cyst and septa, mural nodule was seen in 14 cases and calcification in 3 cases. Cystic wall, septa and mural nodule were enhanced. Thickening capsule wall, septa and intracystic fluid component of higher density could be seen in 5 cystic lesions diagnosed as multilocular cystic renal cell carcinoma during follow up. Conclusion CT and MRI findings of multilocular cystic carcinoma of kidney have some characteristics, CT and MRI play important roles in the diagnosis of muhilocular cystic renal cell carcinoma. Thickening capsule wall, septa, or higher density of the cystic lesion indicate malignancy during follow up.