CT and MR features of struma ovarii
CT and MR features of struma ovarii
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DOI：
10.1007/s00261-011-9817-7
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发表时间：
2012-10-01
影响因子：
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通讯作者：
Togashi, Kaori
中科院分区：
文献类型：
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作者：
Ikeuchi, Takashi;Koyama, Takashi;Togashi, Kaori
为探讨卵巢甲状腺肿的影像学表现，并与CT、MR进行对照分析，回顾性分析26例卵巢甲状腺肿的MRI表现。17例患者的增强后T1加权图像可用。13例CT平扫7例，增强扫描11例，26例肿瘤均为边界清楚的囊实性肿瘤，19例表面多分叶，7例表面光滑。24例为多囊型，2例为单囊型。23例肿瘤的实质成分为增厚的隔壁或壁，3例为肿块。在T2加权像上，16个肿瘤可见明显的低信号室。在T1加权像上，24个肿瘤在实性成分内或邻近实性成分处可见点状高信号灶。仅1处病变出现腹水。在7例非增强CT图像中，有6例识别出高密度区域。在这6个肿瘤中的5个中，高密度区域对应于T2加权图像上突出的低强度区域和实性成分。在7例CT检查中，实性成分中可见曲线状钙化，卵巢甲状腺肿典型表现为分叶状多囊性实性成分病变。肿瘤常包括T2加权像上的低信号腔和T1加权像上的高信号点状病灶。在CT上，实性成分中的高密度区和钙化是常见的表现。
The purpose of this study is to investigate radiologic findings of struma ovarii, and to correlate both CT and MR findings.MR images of 26 cases were retrospectively reviewed. Post-contrast enhanced T1-weighted images were available in 17 patients. CT images, including seven non-contrast and eleven post-contrast studies, were available for review in 13 cases.All 26 tumors appeared as well-defined cystic tumors with solid components, which were multilobulated surfaces in 19 and smooth surfaces in seven. Twenty-four was multicystic, whereas two were unilocular. The solid components were recognized as thickened septi or walls in 23 and a mass in three tumors. On T2-weighted images, loculi of prominent low intensity were recognized in 16 tumors. On T1-weighted images, the punctuate foci of high intensity were recognized in 24 tumors in or adjacent to the solid components. Ascites was present in only one lesion. In six of seven cases with non-contrast CT images, high attenuation areas were recognized. In five of these six tumors, high attenuation areas corresponded to the areas of prominent low intensity and the solid components on T2-weighted images. In seven cases with CT, curvilinear calcifications were recognized in the solid components.Struma ovarii typically presents as a lobulated multicystic lesion with solid components. The tumors frequently include loculi of low intensity on T2-weighted images and punctuate foci of high intensity on T1-weighted images. On CT, high attenuation areas and calcifications in the solid components are common findings.