2Yamashita Y, Ueno S, Makita O, et al. Hyperechoic renal tumors: An. anechoic rim and intratumoral cysts in US differentiation of renal cell carcinoma from angiomyolipoma[ J ]. Radiology, 1993,188:179-182
3Bosniad MA. Small parenchyma neoplasmas further observations on growth[J]. Radiology, 1995,200:194
4Forman HP. Hyperechoic renal cell carcinomas:increase in detection at US[J ]. Radiology, 1993,188: 431-434
5Curry N. Small renal mass(lession smaller than 3em) image evaluation and management[J]. AJR, 1995,164:355-362
6Hartman Ds, Davis CJ, Johns T, et al. Cystic renal cell carcinoma [J]. Urology, 1986,28:145-153
7Siegel CL, Middleton WD, teefey SA, et al. Angiomy olipoma and rend cell carcingma: US differemtiation [ J ]. Radiology, 1996,198: 789-793
8Szolan DH, Kammechuber Faltziebles S, et al. Multiphasic helical CT of kindey ncreased conspicuity for detection and characterization of small renal mass[J ]. Radiology, 1997,202: 211-217