超声联合增强CT诊断卵巢甲状腺肿

目的 探讨超声联合增强CT诊断卵巢甲状腺肿（SO）的价值。方法 回顾性分析17例经手术病理证实的SO患者的声像图及增强CT特点,并与病理结果对照。结果 17例包括良性14例及恶性3例SO,其中10例囊实混合性,6例多囊性,1例单纯实性。超声于6例肿瘤实性部分发现 "甲状腺肿突起",CT值35~82 HU[平均(61.5±12.1)HU];囊性部分呈无回声或低回声,对应CT值13~89 HU[平均(43.4±22.7)HU];其中7例含"高密度囊"（CT值>50 HU）。CT增强显示14例实性成分及囊壁强化,其中9例明显强化或呈特征性"甲状腺样强化",对应的CDFI未见明显血流。结论 SO多为囊性或囊实性肿块;实性成分显著强化结合CDFI少量血流信号不一致、囊液CT值增高结合声像图无回声或低回声不一致可能是SO的特异性影像学表现。

Ultrasound combined with contrast-enhanced CT in diagnosis of struma ovarii

Objective To explore the value of ultrasonography (US) and contrast-enhanced CT (CECT) in diagnosis of struma ovarii (SO). Methods Totally 17 patients with SO proved by pathology underwent US and CECT. Features of US and CECT were analyzed retrospectively and compared with pathological results. Results Of 17 cases, 14 SO were benign and 3 were papillary carcinoma. The tumors appeared as solid-cystic mass in 10 cases, cystic mass in 6 cases, and solid mass in 1 case. The solid portion of tumors showed parenchymal echogenicity with "struma pearls" in 6 cases, and the average attenuation on plain CT was 35-82 HU (mean [61.5±12.1] HU). The cyst portion of tumors had variable attenuation on plain CT (13-89 HU, mean [43.4±22.7] HU). Plain CT value of SO were higher than 50 HU in 7 cases, whereas present as anechogenicity or hypoechogenicity on ultrasonograms. On CECT, strong or very strong enhancement like thyroid was found in 9 cases, but the tumors did not have abundant blood supply on CDFI. Conclusion SO tends to appear as cystic-solid or multilocular cystic mass. Specific imaging features, including strong enhancement of solid components on CECT but without abundant blood flow on Doppler images, variable attenuation of cystic components with anechogenicity or hypoechogenicity on ultrasonograms are hints on diagnosing SO.