摘要
目的：探讨乳头状肾细胞癌的CT表现特点,以提高其诊断符合率。方法：回顾性复习20例手术病理证实的乳头状肾细胞癌的CT表现,对肿块的边界、大小、均匀度及强化度等因素进行分析。结果：20例乳头状肾细胞癌大小在2.26~11.35 cm之间,平均5.57 cm,其中〈3 cm 5例;肿瘤边界清楚8例,边缘清楚但有分叶6例,边缘欠清楚6例。肿瘤内部密度均匀8例;囊变8例,钙化4例。乳头状肾细胞癌平扫期CT值在23~48 HU之间,增强后强化程度较低,皮髓期和实质期CT值32~69 HU和52~82 HU,两期相对强化比RER值分别为0.28~2.79及0.27~2.27。2例有淋巴结转移,1例有左侧坐骨转移,肾静脉和（或）下腔静脉癌栓未见。结论：乳头状肾细胞癌体积小时一般密度均匀、边界光整,增强后强化程度较肾实质明显偏低,但也可出现体积较大、强化明显、囊变坏死或周边侵犯及转移等表现。
Objective：To discuss the imaging features of papillary renal cell carcinoma（PRCC） for better understanding it.Methods： The CT imaging features of 20 cases of PRCC confirmed by surgery and pathology were reviewed retrospectively.The margin,size,homogeneity and degree of enhancement of the tumors were analyzed.Results：The size of PRCC was from 2.26~11.35cm with an average of 5.57cm.Five cases were smaller than 3cm,The margins of tumor were distinct in 8 cases,indistinct in 6 cases and distinct but lobulated in other cases.The tumors in 8 cases were homogeneous;8 cases were cystic;4 cases contained calcification.The CT value of the PRCC on pre-contrast imaging was between 23~48HU.The CT value in corticomedullary phase and nephrographic phase was 32~69HU and 52~82HU,respectively.The relative enhancement ratio in two post-contrast phases was 0.28~2.79 and 0.27~2.27,respectively.Lymphadenopathy was found in two cases and bone metastasis was found in one case.Venous invasion in renal vein and inferior vena cava was not found.Conclusion：When the lesion is small,PRCC is usually homogeneous with smooth edge and mild enhancement,compared to the normal renal parenchyma.But in large tumors,intensive enhancement,cystic necrosis,invasion of surrounding tissue and metastasis may be found.
出处
《放射学实践》
北大核心
2011年第6期627-630,共4页
Radiologic Practice
关键词
肾肿瘤
癌
肾细胞
体层摄影术
X线计算机
Kidney neoplasms
Carcinoma
renal cell
Tomography
X-ray computed
