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目的：探讨卵巢囊性畸胎瘤的ＣＴ表现及其诊断价值。材料和方法：２０例卵巢畸胎瘤均作ＣＴ扫描和Ｂ超检查，全部病例均经手术病理证实。结果：２０例均显示肿瘤内脂肪存在，１８例囊内出现Ｒｏｋｉｔａｎｓｋｙ结节，１７例显示有钙化，牙齿或骨骼影。１９例为良性囊性畸胎瘤，１例恶变。４例发生皮样囊肿扭转，其中二例伴有同侧附件出血坏死。ＣＴ和Ｂ超对本病的确诊率分别为１００％和６５％。结论：ＣＴ是确诊囊性畸胎瘤及其并发症的主要检查方法。肿瘤内脂肪是其最基本的表现，结合囊内Ｒｏｋｉｔａｎｓｋｙ结节或／和钙化、牙齿、骨骼，诊断即可成立。
Objective: To investigate the CT findings and diagnostic value of ovarian cystic teratoma. Materials and Methods: Twenty cases of ovarian teratomas were examined by CT scan and B-ultrasound. All cases were confirmed by pathology. RESULTS: Twenty patients showed presence of intratumoral fat, Rokitansky nodules appeared in 18 capsules, and calcification, dental or skeletal shadows in 17 cases. 19 cases were benign cystic teratomas and 1 case was malignant. Dermoid cyst torsion occurred in 4 cases, including 2 cases with hemorrhage and necrosis on the same side. CT and B-ultrasound diagnosis rate of the disease were 100% and 65%. Conclusion: CT is the main method for the diagnosis of cystic teratoma and its complications. Intratumoral fat is its most basic manifestation, combined with Rokitansky nodules in the capsule or/and calcification, teeth, and bones. Diagnosis can be established.