Estrogen receptors in renal carcinoma.

The presence of estrogen receptors was determined in 31 cases of renal carcinoma by use of the charcoal absorption technique. In 26 of these cases, the 'normal' counterpart of the same kidney was also studied. In 13 normal and in 19 neoplastic samples, the values were undetectable; in the other cases, the values were very low. Progesterone and dihydrotestosterone receptors were also studied in four cses (both normal and neoplastic tissue) by use of a gel-filtration assay: all the samples were negative. These findings do not support the presence of significant amounts of estrogen receptors in kidney carcinoma.