CT Diagnosis of Ovarian Cystic Lesions

Objective To improve the diagnostic accuracy of ovarian cystic lesions with CT scan.Materials and Methods CT findings of 121 patients with 161 surgically and pathologically proved ovarian cystic lesions were retrospectively analyzed.Results Of 161 lesions, 134 were benign (in 102 cases) and 27 were malignant (in 19 cases). 120 lesions were entirely cystic and 41 carried nodules on the cystic wall (74.5%) or solid components (25.5%). The 161 lesions included following diseases: cystic teratoma (n=25, 21 cases), cystadenoma (n=18, 18 cases), cystadenocarcinoma (n=12, 7 cases), Krukenberg tumor (n=7, 5 cases), endometrial cyst (n=39, 31 cases), corpus luteum cyst (n=9, 8 cases), follicle cyst (n=9, 8 cases), serious or mucous cyst (n=11), Wolffian cyst (n=10), chronic ectopic pregnancy (n=4), tuboovarian abscess or hydrosalpinx (n=13, 9 cases), and miscellaneous (n=4). The total accuracy of preoperative diagnosis was 81.8%. Conclusion The ovarian cystic lesions has a wide spectrum, which has similar CT signs. Benign cystic lesions are usually round or oval in shape with a thin and even wall. Malignant cystic lesions are usually bilateral, irregular in shape, with thick and irregular wall or septa. CT scan is a valuable means for the diagnosis of ovarian cystic lesions.