Fielding J R, Visweswaran A, Silverman S G, Granter S R, Renshaw A A
Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
J Comput Assist Tomogr. 1999 May-Jun;23(3):441-4. doi: 10.1097/00004728-199905000-00020.
The purpose of this work was to correlate the CT, ultrasound, and pathologic features of metanephric adenoma, a rare benign renal tumor in adults.
Retrospective review of medical records (1990-1997) revealed three adult female patients who had both preoperative imaging and nephrectomy with pathologic diagnosis of metanephric adenoma performed at our institution. CT (n = 3) and ultrasound (n = 2) features were reviewed in consensus by two radiologists and correlated with pathologic findings.
In all three cases, the metanephric adenoma was of increased attenuation relative to adjacent renal parenchyma on unenhanced CT scans. No septa or calcifications were seen. Ultrasound images showed both tumors to be hyperechoic with enhanced through-transmission.
The CT and ultrasound findings correlate with the pathologic features of a high nuclear-to-cytoplasmic ratio and psammomatous calcifications. In the adult population, it is unlikely that metanephric adenoma can be prospectively differentiated from renal cell carcinoma based on imaging features.
本研究旨在关联后肾腺瘤（一种成人罕见的良性肾肿瘤）的CT、超声及病理特征。
回顾性分析1990年至1997年的病历，发现三名成年女性患者在我院接受了术前影像学检查及肾切除术，术后病理诊断为后肾腺瘤。两名放射科医生共同回顾了CT（n = 3）及超声（n = 2）特征，并与病理结果进行关联。
在所有三例病例中，后肾腺瘤在平扫CT上相对于相邻肾实质呈高密度。未见分隔或钙化。超声图像显示两个肿瘤均为高回声，且透声增强。
CT及超声表现与高核质比及砂粒体钙化的病理特征相关。在成人中，基于影像学特征前瞻性地区分后肾腺瘤与肾细胞癌不太可能。
