[Kidney metastases in computerized tomography]

The CT image of renal metastases is described for 29 patients. The most frequent primary tumour was the bronchial carcinoma, followed by melanoma and cervical carcinoma. In 12 of 29 patients (41%) the metastases occurred bilaterally, in 17 (59%) unilaterally. 9/29 (31%) had solitary, 20/29 (69%) multiple renal metastases. In 19 (66%) these had a size of up to 3 cm and were situated intraparenchymally. Space-occupying growths up to a size of 10 cm which grew exophytically were seen in melanoma and carcinoma of the larynx and chorion. In the plain CT the metastases presented isodense or slightly hypodense in 25 of 27 examinations (93%). After application of contrast medium all presented hypodense with the exception of metastases of a chorionic carcinoma.