卵巢卵泡膜细胞瘤MRI表现与病理

MRI Findings and Pathology Features of Ovarian Thecoma

目的卵巢卵泡膜细胞瘤(OT)较少见,现探讨卵巢OT的MRI表现及病理特征。资料与方法分析经病理证实的30例OT患者的MRI表现,并与其病理结果进行对照,分析病灶大小、囊实性与腹水的相关性。结果 MRI平扫病灶实体T1WI均呈等或稍低信号。T2WI表现为21例呈稍低信号夹杂少量高信号,2例呈高信号,7例呈高低混杂信号;增强早期病灶实性部分均轻度强化,延迟后强化程度增加。17例MRI见腹水,10例表现为少量盆腔积液。术中发现30例均有不等程度的腹水。腹水量与病灶大小无相关性(r=0.29,P>0.05),肿瘤MRI囊性变与腹水程度亦无相关性(r=0.25,P>0.05)。病理学细胞组成与病灶MRI表现差异无统计学意义(χ2=0.67,P>0.05)。结论 OT在T2WI上呈低信号的特征及增强模式可以反映其病理特征,有一定的诊断特异性,有助于OT的诊断。

Purpose To investigate the MRI findings and pathologic features of uncommon ovarian thecoma （OT）. Materials and Methods MRI findings of 30 patients with OT confirmed by surgery and pathology were retrospectively reviewed, and the results were compared with pathologic findings. Correlation of tumor size and solid cystic with ascites was analyzed. Results All the tumors presented iso- or hypointense signal intensity on T1WI. On T2WI, 21 cases showed slight hypointense with patchy hyperintensity signal intensity in the lesions, two cases showed hyperintense and seven cases showed hypointensity mixed with hyperintensity. After contrast enhanced, most lesions displayed mild early enhancement with slightly progressive enhancement on the delayed phase. Ascites was seen in 17 cases on MRI. Small amount of pleural effusion in the pelvis was seen in 10 cases. During operation, 30 cases had varying degree of ascites. The amounts of ascites was not statistic correlated with the lesion size （r=0.29, P〉0.05）, neither with tumor cystic degeneration （r=0.25, P〉0.05）. There was no statistical difference between cellular composition and MRI findings （χ2=0.67, P〉0.05）. Conclusion Hypointensity on T2WI and progressive enhancement pattern indicate pathologic characteristics of OT, which is helpful in the diagnosis of OT.