CAJ | 학술논문

目的探讨微小甲状腺癌(MCT)的CT表现特点.方法回顾性分析经手术、病理证实的47例共50枚直径在0.5～1.0 cm MCT的CT资料.结果 50枚瘤体中,38枚瘤体CT平扫呈均匀低密度,增强后不同程度均匀强化；33枚瘤体出现甲状腺平扫边缘中断征；增强后30枚瘤体轮廓较平扫模糊,瘤体相对低密度范围缩小；31枚瘤体不规则形；15枚瘤体钙化,其中细颗粒状钙化13枚；CT平扫未显示的12枚瘤体中,合并甲状腺炎10枚.结论瘤体形态不规则、甲状腺平扫边缘中断征、瘤体增强后相对低密度区小于平扫、细颗粒状钙化、瘤体周围多发小淋巴结有助于MCT的诊断；甲状腺炎可以掩盖MCT,需引起注意.
목적 탐토미소갑상선암(MCT)적CT표현특점.방법 회고성분석경수술、병리증실적47례공50매직경재0.5～1.0 cm MCT적CT자료.결과 50매류체중,38매류체CT평소정균균저밀도,증강후불동정도균균강화；33매류체출현갑상선평소변연중단정；증강후30매류체륜곽교평소모호,류체상대저밀도범위축소；31매류체불규칙형；15매류체개화,기중세과립상개화13매；CT평소미현시적12매류체중,합병갑상선염10매.결론 류체형태불규칙、갑상선평소변연중단정、류체증강후상대저밀도구소우평소、세과립상개화、류체주위다발소림파결유조우MCT적진단；갑상선염가이엄개MCT,수인기주의.
Objective To evaluate the imaging feature of microcarcinoma of thyroid with CT.Methods CT findings of 50 lesions in 47 patients with microcarcinoma of thyroid ( dimeter,0.5 to 1.0 cm) were retrospectively analyzed.All of the patients had pathological diagnosis.Results Of the 50 lesions,38 lesions showed homogeneous low density on non-enhanced CT and various degree of enhancement on postcontrast CT. Thirty-three lesions showed discontinuous edge of the thyroids on non-enhanced CT. The boundary of 30 lesions became unclear on post-contrast CT relative to non-enhanced CT and the extension of low density of lesions decreased. Theshape of 31 lesions were irregular. Fifteen lesions showed calcifications,with granular calcifications in 13 lesions.Ten lesions were complicated with thyroiditis.Conclusions Irregular shape,discontinuous edge of the thyroids,the shrinkage of low density of lesions on post-contrast CT relative to non-enhanced CT,granular calcifications and multiple small lymph node around lesions indicate the diagnosis of microcarcinoma of the thyroid.It should be noted that thyroiditis can cover up microcarcinoma of thyroid.