The radiologic and clinical aspects of calcified hypernephroma.

The radiologic, pathologic, and clinical findings were reviewed in 18 patients with calcified hypernephroma and 6 with calcified benign renal lesions. Our results suggest: (a) that the pattern of calcification in a renal parenchymal lesion is of little assistance in diagnosis; in this series, many hypernephromas had peripheral curvilinear calcifications, and most benign renal lesions had internal amorphous calcifications; (b) that no distinct angiographic pattern exists in calcified hypernephroma, and a spectrum ranging from avascular to hypervascular may be identified; and (c) that these tumors may behave more benignly than uncalcified hypernephroma (5-year survival 78%).