Renin-producing renal cell carcinomas—clinical and experimental investigations on a special form of renal hypertension |
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Authors: | J. Steffens R. Bock H. U. Braedel E. Isenberg C. P. Bührle M. Ziegler |
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Affiliation: | (1) Department of Urology, University of Saarland, Homburg/Saar, FRG;(2) Institute of Anatomy, University of Saarland, Homburg/Saar, FRG;(3) Institute of Physiology, University of Heidelberg, Heidelberg, FRG |
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Abstract: | Summary The pathogenetic relationship between tumour and hypertension was investigated in 129 patients with renal cell carcinoma, of whom 41 (31.8%) were hypertensive. Of these 41 patients with renal tumours and hypertension, 6 (14.6%) were found to have primary reninism. In these patients the plasma renin activity in blood from the renal veins showed a tumour kidney to contralateral kidney ratio of between 4 and 7, and 2 patients also had secondary hyperaldosteronism. In the same 6 cases the renin content in the renal tumour tissue was significantly higher than that in tissue from the adjacent tumour-free renal cortex of the ipsilateral kidney. Immunohistochemical demonstration of renin in the tumour was only possible in these 6 cases. In 5 of these patients blood pressure returned to normal following nephrectomy; in the 6th case there was a drop in blood pressure after nephrectomy. In 3 renin-positive tumours examined, autonomous renin production was demonstrated in cell culture. Renin-producing renal cell carcinomas are an uncommon cause of renal hypertension. The differential diagnosis of hypertension should therefore also include renal tumour. |
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Keywords: | Renal cell carcinoma Renin Endothelial cells Hypertension |
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