Honda H, Coffman C E, Berbaum K S, Barloon T J, Masuda K
Department of Radiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Acta Radiol. 1992 Jan;33(1):39-44.
The CT findings in 32 patients with pathologically proven metastases to the kidney were compared to findings in 74 patients with renal cell carcinoma. Fourteen CT criteria were chosen to describe and characterize the lesions and 2 radiologists evaluated the CT images retrospectively according to these criteria. Renal metastases were characterized as small, multiple, bilateral, wedge-shaped, less exophytic, and located within the renal capsule. Renal cell carcinomas were single, unilateral, nonwedge-shaped, and exophytic, and easily transgressed the renal capsule. The sensitivity of CT to discriminate renal cell carcinoma from renal metastasis was 93.2% for renal cell carcinoma, and to discriminate renal metastasis from renal cell carcinoma was 75.0% for renal metastases by computer posterior probabilities. This study indicates that CT is useful for distinguishing these clinically important tumors. By using posterior probability, some unnecessary biopsies may be avoided.
将32例经病理证实有肾转移的患者的CT表现与74例肾细胞癌患者的表现进行了比较。选择了14项CT标准来描述和表征病变，2名放射科医生根据这些标准对CT图像进行了回顾性评估。肾转移瘤的特征为小、多发、双侧、楔形、外生性较小且位于肾包膜内。肾细胞癌为单发、单侧、非楔形且外生性，容易侵犯肾包膜。通过计算机后验概率，CT鉴别肾细胞癌与肾转移瘤时，对肾细胞癌的敏感性为93.2%，对肾转移瘤鉴别肾转移与肾细胞癌的敏感性为75.0%。本研究表明，CT有助于区分这些临床上重要的肿瘤。通过使用后验概率，可避免一些不必要的活检。
