Preoperative sonographic evaluation of endometrial cancer.

Preoperative sonography was performed in 93 patients with a histologic diagnosis of endometrial cancer. Uterine volume was enlarged (mean, 164 +/- 143.7 cm3; range, 25 to 800) but did not significantly correlate with the degree of myometrial invasion. Endometrial echoes were identified in 93.5% of the cases. A significant correlation (p less than 0.01, Newman-Keuls test) was found between endometrial echoes volume and myometrial invasion. Myometrial invasion was correctly predicted by sonography in 80% of the cases. Polypoid intraluminal growth was the most common factor affecting sonographic accuracy. Sonographic staging was accurate in 91% of the cases. Sonography appears to be an efficient, economic, and practical tool for clinical staging of endometrial cancer.