Objective To explore the MRI features and pathological basis of mature teratoma of ovary, and to improve the diagnostic accuracy of MRI. Methods Retrospectively analyze MRI imaging features of 43 cases con-firmed ovarian mature teratoma by operation and pathology. Results Of 43 patients with a total of 50 ovarian mature teratoma,there were 16 cases in left ovary, 20 cases in the right ovary, 7 cases involved bilateral ovaries, the maximum diameter of the tumor ranged from 1~9 cm, they were mostly round lumps with complete capsule. The components of tumor were different,so the signal performance were different by MR, such as by T1WI and T2WI adipose tissue showed high signal, fat suppression showed low signal, chemical shift imaging showed high signal with the same phase, reverse phase signal was attenuated to different extent, hair, bone tissue showed low signal. Conclusion Ma-ture teratoma have specific MRI expression, which will do help for analyzing structure and composition of ovarian ter-atoma, and high value in clinical application.%目的 探讨卵巢成熟性畸胎瘤的MRI表现及其病理基础,以提高MRI的诊断准确性. 方法回顾性分析43例经手术、病理证实的卵巢成熟性畸胎瘤MRI影像表现特点. 结果 43例患者中共50个卵巢成熟性畸胎瘤,其中左侧卵巢16例,右侧卵巢20例,双侧卵巢7例,肿瘤最大径1~9 cm,多为类圆形肿块,包膜完整.肿瘤内成分不同,MRI信号表现不同,脂肪组织T1WI及T2WI表现为高信号,脂肪抑制呈低信号,化学位移成像同相位表现为高信号,反相位信号有不同程度的衰减,头发、骨骼组织表现为低信号. 结论 成熟性畸胎瘤具有特异性MRI表现,MRI能对卵巢畸胎瘤内部结构及成分进行分析,具有较高的临床应用价值.
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