CT Diagnosis of Ovarian Germ Cell Tumors / 实用放射学杂志

ABSTRACT

Objective To inquire into the CT feature of ovarian germ cell tumors.Methods 46 surgical and pathalogic proved ovarian germ cell tumors in 37 cases with their CT appearance were analyzed retrospectively.The characteristics of their images were discussed correlated with their pathology.Results 46 germ cell tumors in 37 cases composed of 43 teratoma,2 endodermal sinus tumor and 1 mixed germ cell tumor.For teratoma of the ovary,the sensivity of CT and US was all 100%,the specificity of CT and US was 93.02% and 58.14%.In the 30 patients with 38 benign cystic teratomas,CT demonstated 35 tumors in 27 patients,all had fat attenuation,5 had fat-fluid level,11 had a round mass in the cyst,16 had calcification or tooth.5 immature teratoma presented as mainly cystic or solid mass with some calcification and a little small pieces of fat attenuation.Some curved band-like low attenuation area in 1 solid mass were also found on CT.1 endodermal sinus tumor presented as cystic mass and the other one presented as mainly solid mass with large irregular hypodense necrotic area.Mixed germ cell tumer presented as solid mass with irregular border.Conclusion Ovarian teratoma and endodermal sinus tumor had their characteristic CT features.Particularly for teratoma,CT is a better image modelity with specific nature,compared with US.