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KMID : 0386119930290040800
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Journal of the Korean Radiological Society
1993 Volume.29 No. 4 p.800 ~ p.804
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CT Staging of Renal Cell Carcinoma: Emphasis on Perinephirc Tumor Extension
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최윤영
김선미/최문환/방덕자/고병희/조온구
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Abstract
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A total of 47 preoperative CT scans in patients with renal cell carcinoma were retrospectively reviewed and compared with surgical findings to assess the accuracy of CT for determining the perinephric tumor extension. CT criteria for perinephric
extension were hazy ill-defined tumor margin, perirenal nodule and fascial thickening. Regardless of the tumor stage, the accuracy of CT in detecting perinephric extension was 76.6%(36/47), with a sensitivity of 88.9% (16/18) and specificity of
68.9%
(20/29). The cause of understaging (n=2) was microscopic infiltration of the perinephric space. The causes of overstaging were tumor infiltration to the renal capsule (n=5), partial adhesion with the perinephric fat (n=3) and renal vein
thrombosis
(n=1). A smooth clear tumor margin is highly reliable sign for stage I but infiltrative findings onto renal capsule and perirenal fat could be considered stage I.
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