卵巢甲状腺肿的超声和MRI影像表现与病理对照分析

Ultrasonography compared with magnetic resonance imaging for the diagnosis of struma ovarii:Correlation with histopathology

目的探讨卵巢甲状腺肿(struma ovarii,SO)的超声和MRI的影像特点及其病理学基础,比较两种检查对SO的诊断效能。材料与方法对24例SO患者及72例对照病例进行回顾性分析,所有患者术前均行盆腔超声及MRI检查,对照分析SO的影像表现与病理结果。结果SO在超声及MRI上常表现为多房囊性或囊实性肿块,囊性成分回声或信号混杂,可见特征性超声"白球"样高回声团及MR"黑珍珠"样低信号颗粒,肿瘤实性成分可见丰富血流信号及明显强化。超声与MRI用于诊断SO的敏感度、特异度、约登指数分别为37.50%、90.78%、0.28和79.17%、94.44%、0.74。结论超声与MRI均可显示SO的影像学特征,而MRI对SO的诊断敏感度及总体准确性明显高于超声,超声后补充MRI检查有助于提高SO的术前检出率。

Objective:To analyze the ultrasound and MR features of struma ovarii(SO),and to evaluate the diagnostic efficacy of the two examinations for SO.Materials and Methods:The study included 24 SO cases and 72 control cases who underwent both ultrasound and MRI examinations before surgery.The imaging manifestations and pathological results of SO were compared retrospectively.Results:On ultrasound and MR imaging,the common appearance of SO was a multi-lobulated cystic or cystic-solid mass,with variable echo or signal intensity in cystic components,and rich blood flow or significant enhancement in solid components.The most specific feature was the"roundish white ball"on ultrasound and the low signal"struma pearl"on MR images.The sensitivity,specificity,Youden index were 37.50%,90.78%,0.28 for ultrasound,and 79.17%,94.44%,0.74 for MRI,respectively.Conclusions:Both ultrasound and MR could manifest some characteristic imaging features of SO,but the sensitivity and diagnostic efficacy of MRI was significantly superior than that of ultrasound.MR imaging could help ultrasound improve the detection of SO.