Ferrozzi F, Bova D, Gabrielli M
Institute of Radiology, University of Parma, Viale Gramsci, 14, I-43100 Parma, Italy.
Eur Radiol. 1999;9(8):1590-2. doi: 10.1007/s003300050890.
The differential diagnosis of renal masses containing fatty foci is limited to a small number of well-defined tumors, angiomyolipoma being the most frequent. In recent years clear cell carcinomas with intratumoral fatty foci have been reported, due to either entrapment of local fat or to regressive adipose metaplasia. Demonstration of focal calcifications is a valuable sign, being relatively common in carcinomas while rare in more benign lesions. We report a case of a foreign-body granuloma of the kidney, containing both calcifications and foci of fat. The value of this case, in our opinion, is that it demonstrates that detection of the previously mentioned features in a renal mass does not necessarily imply a presumptive diagnosis of renal cell carcinoma.
含有脂肪灶的肾脏肿块的鉴别诊断局限于少数几种明确的肿瘤，其中血管平滑肌脂肪瘤最为常见。近年来，已有关于肿瘤内含有脂肪灶的透明细胞癌的报道，其原因要么是局部脂肪的包绕，要么是脂肪化生的退行性变。局灶性钙化的显示是一个有价值的征象，在癌中相对常见，而在良性病变中则很少见。我们报告一例肾脏异物肉芽肿病例，其含有钙化和脂肪灶。我们认为，该病例的价值在于它表明在肾脏肿块中检测到上述特征并不一定意味着推定诊断为肾细胞癌。
