目的：探讨卵巢未成熟畸胎瘤的MRI表现特征及其病理基础，分析其与病理分级、临床分期的相关性。资料与方法：对9例经病理证实的卵巢未成熟畸胎瘤患者的MRI表现及其病理结果进行回顾性分析与总结，并分析MRI表现与病理分级和FIGO分期的相关性。结果：9例病变在MRI上均表现为巨大囊实性肿块，边缘分叶但境界清楚，病灶内部信号不均，根据实性部分所占比例分为3种类型：囊性为主型（2例）、囊实混合型（5例）和实性为主型（2例）。实性成分均表现为多发小囊样结构，内部同时散在骨化、脂肪样信号灶。囊性成分信号多均匀，大部分呈T1WI低T2WI高的液体信号。增强扫描病灶内软组织成分显著强化呈网格状，分隔及多囊样结构显示更清楚。MRI分型与病理分级和FIGO分期间的相关系数分别为0.3和0.216，均无统计学意义（P＞0.05）。结论：MRI可以较准确地反映卵巢未成熟畸胎瘤的病理特征，但与其病理分级及临床分期无显著相关性。
Abstract
Objective: To investigate the MR findings of ovarian immature teratoma and to correlate MR findings with pathological grading and clinical staging. Materials and Methods: The MR findings and pathology results of nine cases with pathologically proven immature teratoma were analyzed retrospectively. Comparisons between the MR findings and pathological grades and FIGO stages were evaluated by Spearman rank-order correlation. Results: On MR images all lesions appeared to be fat-containing tumors with solid components consisting of numerous cysts. According to the relative volume of solid components, the MR findings of the ovarian immature teratoma can be divided into three types: predominant fluid components(2 cases), mixed with fluid and solid components(5 cases) and predominant solid components(2 cases). The solid components showed heterogeneous signal intensity on MR images, containing numerous long T1 and long T2 signal of cystic area of various sizes. Scattered short T1, long T2 signal of fat foci and long T1, short T2 signal of calcifications were identified in all lesions. The solid components revealed significant contrast enhancement with reticular form. The fluid content exhibited signal intensities similar to simple fluid. The correlation coefficient of Spearman of the MR types and pathological grades was 0.3 and the correlation coefficient of the MR types and FIGO stages was 0.216, the differences were all not statistically significant(P＞0.05). Conclusion: The MR findings of ovarian immature teratoma have some characteristics. There are no significant correlation between the MR types and pathologic grades, and between the MR types and FIGO stages.
关键词
卵巢肿瘤 /
畸胎瘤 /
磁共振成像
Key words
Ovarian neoplasms /
Teratoma /
Magnetic resonance imaging
中图分类号：
Ｒ737.31
Ｒ730.269
Ｒ445.2
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