目的 探讨卵巢单纯型无性细胞 瘤及转移瘤的CT、MRI特点。方法 回顾性 分析15例经手术病理证实的单纯型无性细 胞瘤的CT、MRI表现。结果 13例原发肿 瘤均单发，12例(12/13)呈分叶状，边界 清晰，11例(11/12)肿块内及边缘见强化 血管影，所有病例均伴腹水，但无腹膜 转移，1例(1/13)伴轻度肿大淋巴结。3 例4个转移瘤的形态及强化方式与原发灶 相近，均伴多发肿大淋巴结及腹水，1例 (1/3)有腹膜转移。结论 卵巢无性细胞瘤 原发灶及转移瘤的CT、MRI表现有一定特 征性，尤其是强化特征能够反映其病理 特点，CT、MRI检查各有优势，结合患者 的年龄及血清LDH，大多数可术前正确诊 断。

Objective To explore the CT and MRI features of pure ovarian dysgerminoma and metastases. Methods 15 cases of pure ovarian dysgerminoma proven pathologically were retrospectively analyzed. Results 13 cases of primary tumor were unilateral,12 cases(12/13) showed lobulated with clear boundary,in 11 cases(11/12),the enhancement of blood vessel was found in the inner and the edge of the tumor, in all cases with ascites,but no peritoneal metastasis,1 case(1/13)with mild enlarge lymph nodes. 4 of the 3 patients with metastatic lesions were similar to the primary tumor in the form and strengthening mode,with multiple enlarged lymph nodes and ascites,and 1 cases(1/3) had peritoneal metastasis. Conclusion CT and MRI performance of pure ovarian dysgerminoma and metastases have certain characteristics，especially enhancement pattern is correlated with pathologic characteristics.CT and MRI each has advantages, combinined with the patient's age and serum LDH,most patients can be correctely diagnosed before surgery.