摘要
目的:探讨卵巢无性细胞瘤的特征性MRI表现。方法:回顾性分析13例经手术病理证实的卵巢无性细胞瘤患者的MRI、临床及病理资料,分析病变的大小、形态、密度、信号、边界、强化方式及邻近结构的改变。结果:13例肿瘤最大径>10 cm者8例,呈分叶状10例。瘤体以实性肿块为主,边界均较清,包膜完整8例,2例伴不规则坏死、囊变,3例见流空血管影。瘤体呈长T1、长T2信号,DWI为稍高信号,ADC为稍低信号,9例瘤体内可见低信号纤维间隔影把肿瘤分隔成结节状,其中5例部分瘤内结节呈明显更高信号。增强扫描动脉期为轻度强化,呈"慢进慢出"延时强化改变,静脉期瘤内可见较多明显强化的迂曲血管影。结论:卵巢无性细胞瘤MRI表现具有一定特点,瘤内低信号纤维间隔及被分隔形成的结节状改变对定性诊断有一定帮助。
Objective： To explore the manifestation of MRI features of ovarian dysgerminoma. Methods：The clinical pathologic data and MRI findings in 13 patients with ovarian dysgerminoma confirmed by operation and pathologic examination were retrospectively analysed. The size, shape, density, signal, boundary, strengthen and the changes of the adjacent structure of the mass were observed. Results： The largest diameter in 8 cases was longer than 10 era, and 10 cases showed lobulated in shape with clear boundary and intact capsule （n=8）. The tumor mainly appeared as solid masses in shape with necrosis and cystic lesions （n=2）. Many signal voids of vessel in tumors were observed in three cases. The tumor mainly showed long T1 and long T2 signal on MRI, slightly high signal on DWI maps, and slightly low signal on ADC maps. The signal were mainly uniform. Nine cases with low signal fiber interval in tumor, and the tumor were divided into nodulars by the fiber interval. The higher signal nodular shadows were observed in the tumor in five cases with low signal fiber interval. The tumor were mainly enhanced slightly in the arterial phase after the administration of Gd-DTPA, with a feature of slowly coming into and slowly going out. Many circuitous blood vessels were significantly enhanced in the venous phase. Conclusion： The ovarian dysgerminoma has certain MRI characteristics, and the tumor, the intratumoral low signal hyperdensity and nodules separated by the hyperdensity are helpful to the qualitative diagnosis of ovarian dysgerminoma.
出处
《温州医科大学学报》
CAS
2016年第2期133-136,共4页
Journal of Wenzhou Medical University
