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目的 探讨孤立性肺转移瘤 (SPM)的CT表现 ,以提高对SPM的CT诊断水平。方法 对 2 1例经病理证实的SPM的CT表现进行回顾性分析。结果 ①病灶分布 :2 1例SPM中位于左肺 10例 (4 7.6% ) ,右肺 11例 (5 2 .4% ) ;双肺上叶 (不含左上叶舌段 )3例 (14 .3 % ) ,右中叶及左上叶舌段 5例 (2 3 .8% ) ,双肺下叶 13例 (61.9% ) ;位于肺野外 1/ 3带者 14例 (66.7% ) ,中 1/ 3者5例 (2 3 .8% ) ,内 1/ 3者 2例 (9.5 % )。②大小 :<3cm者 17例 (81.0 % ) ,>3cm者 4例 (19.0 % )。③形态、边缘 :15例 (71.4% )呈圆形或椭圆形且表面光滑 ,界面清楚 ,6例 (2 8.6% )呈不规则形并分别或同时见分叶征 (3例 )、毛刺征 (2例 )、胸膜凹陷征、血管集束征、晕环征 (各 1例 )。④密度 :病灶呈均匀软组织密度 16例 (76.2 % ) ,内见钙化灶 2例 ,空洞 1例 ,低密度坏死区 2例。⑤本组病例均未见SPM侵犯临近支气管。结论 SPM的CT表现具有一些特点 ,但其诊断与鉴别诊断需CT表现紧密结合临床和病理才能得出正确结论。
Objective To investigate the CT findings of solitary pulmonary metastases (SPM) in order to improve the CT diagnosis of SPM. Methods Twenty-one cases of pathologically confirmed SPM were retrospectively analyzed. Results ① The distribution of lesions: 10 cases (4 7.6%) in the left lung and 21 cases in the right lung (52.4%) in the SPM group; 3 cases in the upper lung (excluding the left upper lobe). 3 cases in the middle and upper left lobe, 5 cases in the right middle and upper left lobe (23.8%) and 13 cases (61.9%) in the lower lobe of the lung, 14 (66.7%) in 1 / 3 in 5 cases (23.8%) and 1/3 in 2 cases (9.5%). ② size: <3cm in 17 cases (81.0%),> 3cm in 4 cases (19.0%). ③ morphology and margins: 15 cases (71.4%) were round or oval and smooth, clear interface, 6 cases (22.6%) showed irregular shape and separately or simultaneously see the lobulation sign (3 cases), burr sign (2 cases), pleural indentation, vascular bundle sign, and halo sign (one case each). ④ density: lesions were uniform soft tissue density in 16 cases (76.2%), see the calcification in 2 cases, empty in 1 case, low density necrosis in 2 cases. ⑤ this group of patients were not seen near the bronchial SPM violations. Conclusion The CT findings of SPM have some characteristics, but the diagnosis and differential diagnosis of CT should be closely combined with clinical and pathological findings to get the correct conclusion.