后肾腺瘤的CT表现及病理相关性  

CT features and correlation with pathology of metanephric adenoma

作　　者：孙德政[1,2] 姜天娇 李伟[1] 王家臣[1] SUN Dezheng;JIANG Tianjiao;LI Wei;WANG Jiachen(Department of Radiology,the Affiliated Hospital of Qingdao Uriversity,Qingdao,Shandong Province 266500,China;Department of Radiology,Qingdao Mumicipal Hospital,Qingdao,Shandong Province 260000,China)

机构地区：[1]青岛大学附属医院影像科,山东青岛266500 [2]青岛市市立医院本部放射科,山东青岛266000

出　　处：《实用放射学杂志》2020年第8期1277-1280,共4页Journal of Practical Radiology

摘　　要：目的分析后肾腺瘤(MA)的CT特征及病理相关性.方法回顾性分析11例MA的CT表现,并与手术及病理结果对照.结果MA位于肾髓质内9例,2例呈外生型(起源于肾髓质,向外生长).CT平扫显示病变边界不清,9例为均匀等密度,1例不均匀高密度,1例伴有钙化.在增强CT上,所有病变显示边界清晰,但均未发现包膜;测得MA平均最大直径3.5 cm;1例可见坏死和囊变.病灶CT平扫、增强皮质期、皮髓质期及排泄期平均CT值分别为(38.87±6.66)HU、(55.71±17.74)HU、(67.77±16.86)HU和(65.62±15.99)HU.CT平扫MA与周围正常肾实质CT值差异无统计学意义(P>0.05),各期增强病灶强化程度均低于周围正常的肾实质,差异有统计学意义(P<0.05).结论MA的CT平扫通常表现为等、高密度的实性病变,CT增强常表现为渐进性、均匀的轻度强化,可伴有钙化、坏死,各期CT值均低于周围正常肾实质.Objective To analyze the CT features of metanephric adenoma(MA)and correlation with pathology.Methods The CT findings of 11 patients with MA were analyzed retrospectively。and compared with the results of operation and pathology.Results The tumors were located entirely within the renal medulla in 9 cases,and demonstrated an exophytic pattern(originating from the medulla of the kidney and growing outward)in 2 cases.On the plain CT,the tumors had an unclear margin,and there were 9 lesions with homogenous equal density,1 case with heterogeneous hyperintensity,1 case with focal caleification.On enhanced CT,all of the tumors had a clear margin,but without the capsules.The mean greatest diameter of the tumors was 3.5 cm.1 case showed necrosis and cystic change.The mean CT values of the tumors on the plain and enhanced CT scans(cortical phase,corticomedullary phase,and excretory phase)were(38.87±6.66)HU,(55.71±17.74)HU,(67.77±16.86)HU and(65.62±15.99)HU,respectively.There were no statistically significant differences between MA and the surrounding normal renal parenchyma on the plain CT(P>0.05),but the enhanced degrees of the tumors in each phase were significantly lower than those of the surrounding normal renal parenchyma(P<0.05).Conclusion MA usually shows a solid lesion with equal or higher density on CT plain scan,gradually homogenous mild enhancement on enhanced CT scan,and can be accompanied with calcification and necrosis.CT value of MA is alway's lower than that of the surrounding normal renal Parenchyma in all enhanced phases..

关 键 词：后肾腺瘤 肾脏 计算机体层成像 

分 类 号：R737.11[医药卫生—肿瘤] R814.42[医药卫生—临床医学]