The aim of this study was to verify the role of the association of pelvic ultrasonography and CA-125 assay in the preoperative evaluation of ovarian carcinoma. The Authors examined 119 patients undergoing laparotomy for adnexal masses. Thirty-six had an ovarian carcinoma, the other 83 patients were affected by benign ovarian pathologies. Before surgery every patient underwent a pelvic ultrasonography. The data resulting from ultrasonography were processed on the basis of a personal scoring morphologic echostructural evaluation system. Furthermore in every patient the preoperative serum levels of CA-125 were measured. In the group of patients with ovarian carcinoma the ultrasonography score was greater than or equal to 10 in 26, while serum CA-125 was greater than or equal to 65 U/ml in 30 and greater than or equal to 35 U/ml in 31. In the group of patients with benign ovarian pathology the ultrasonography score was found to be greater than or equal to 10 in 2, while serum CA-125 was greater than or equal to 65 U/ml in 4 and greater than or equal to 35 U/ml in 20. Fixing 10 as reference value of ultrasonography score for ovarian carcinoma diagnosis, pelvic ultrasonography and a sensitivity of 72.2%, a specificity of 97.9%, a diagnostic accuracy of 89.9%. With a reference value of 65 U/ml CA-125 had a sensitivity of 83.3%, a specificity of 95.2%, a diagnostic accuracy of 91.9%. With a reference value of 35 U/ml CA-125 had a sensitivity of 86.1%, a specificity of 75.9%, a diagnostic accuracy of 79.0%.(ABSTRACT TRUNCATED AT 250 WORDS)