The extragonadal endodermal sac tumor (EEST) is an extremely rare malignant germ cell tumor and has a poor prognosis. Therefore, familiarity of the radiological characteristics of EESTs could help preoperative diagnosis and improve surgical management of patients. In this study, we investigate CT and MRI characteristics of 25 patients with EESTs correlated with pathological results, for better understanding and cognition in the diagnosis of EEST. Finally, we found that imaging features coupled with clinical data and the serum AFP check are helpful for the diagnosis of EEST and could improve the accuracy of the preoperative diagnosis.
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