Estrogen receptors (ER) and progesterone receptors (PR) were determined on curettages from women with endometrial adenocarcinoma. The results obtained with the enzyme immunoassay (EIA) and the dextran-coated charcoal (DCC) assay were compared. A highly significant correlation was obtained between these methods for the ER measurement (Rs = 0.91). For PR determination, the Rs value between EIA and DCC assay was 0.57 and the mean value of PR-DCC is significantly higher than the mean value of PR-EIA. These results suggest that EIA is a suitable method for ER measurement. For PR determination on curettage material the DCC assay seems more accurate than EIA.

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