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TIILE:Ability of Low-Dose Helical CT To Distinguish Between Benign and Malignant Noncalcified Lung Nodules*
低剂量螺旋CT分辨良性和恶性非钙化性肺结节的能力
Steven B. Markowitz, MD; Albert Miller, MD, FCCP; Jeffrey Miller, MD; Amy Manowitz, MS; Sylvia Kieding, BA; Lee Sider, MD and Alfredo Morabia, MD, PhD
Abstract
Study objectives: Low-dose helical CT scanning identifies early stage lung malignancies and also a large proportion of lung nodules of uncertain diagnostic and prognostic significance (ie, indeterminate nodules). The sensitivity, specificity, and predictive value of these indeterminate nodules detected by CT scanning as part of a lung cancer screening program is largely unknown. We therefore calculated the sensitivity, specificity, and predictive values of CT-detected lung nodules that were followed up at least 18 months.
研究目标:低剂量螺旋CT扫描能够确定早期的肺恶性病变,以及很大一部分诊断和预后意义不明的肺结节(也就是,未确诊结节)。这些由作为肺癌筛查程序之一的CT扫描检测到的未确诊结节的敏感性、特异性和预测价值尚未得到确认。因此我们通过跟踪病例至少18个月,计算了CT检测肺结节的敏感性、特异性和预测价值。
Design: Single-arm screening trial with longitudinal follow-up.
设计:纵向随访的单侧筛查实验。
Setting: Rural areas of United States, from 2000 to 2004.
地区:美国农村,2000-2004年。
Participants: Former and current nuclear weapons workers, 45 years old, including smokers and never-smokers, with variable exposure to occupational lung carcinogens.
参与者:农民和在职的核武器工人,45岁,包括有吸烟史与无吸烟史,并且有职业性的肺致癌物的接触史。
Interventions: A total of 4,401 participants were CT scanned for lung cancer with an initial full chest low-dose CT scan, interval CT scans at 3, 6, and 12 months for indeterminate lung nodules (eg, nodules not immediately suspicious for lung cancer), and a 18-month, full-chest, low-dose incidence CT scan.
检查:总共约4401人参与了肺癌的肺部CT扫描,首先是全胸腔低剂量CT扫描,然后对未确诊肺部结节(即,不能立刻怀疑为肺癌的结节)每隔3、6和12个月行间断CT扫描,最后于第18个月行全胸腔低剂量CT扫描。
Results: We achieved follow-up for a minimum of 18 months for > 95% of 807 participants with indeterminate or suspicious lung nodules. Only 3 of 727 indeterminate nodules were identified as being malignant during the subsequent 18 months. The radiologist’s designation of a nodule as suspicious had a sensitivity of 84.2% and a specificity of 96.6%. Given a prior probability of lung cancer of 2.4%, positive and negative predictive values were 37.2% and 99.6%. Overall, we detected 33 primary lung cancers, including 19 stage I cancers, 5 stage II cancers, 7 stage III-IV cancers, and 3 limited-stage small cell cancers.
结果:我们成功地完成了对有未确诊或疑似肺结节的807名参与者中的95%以上的人的最短18个月的随访。727名未确诊结节中仅有3个在后续的18个月中被确认为恶性。放射医师对疑似结节诊断的敏感度为84.2%,特异度为96.6%。考虑早期肺癌2.4%的可能性,阳性和阴性预测价值分别为37.2%和99.6%。总的来说,我们发现了33例原发性肺癌,包括1期19例,2期5例,3-4期7例,以及3例局限期的小细胞肺癌。
Conclusions: Helical CT scanning detects many indeterminate nodules, but few are malignant. CT scanning has high sensitivity and specificity to detect early lung cancer. The problem of false-positive results in helical CT scanning is limited and can be rationally managed. Current CT follow-up recommendations are supported.
结论:螺旋CT扫描检测了一些未确诊结节,但是很少为恶性。检测早期肺癌,CT扫描具有高度特异性和敏感性。假阳性的问题导致螺旋CT扫描应用的局限性,应理性的对待。结果支持当前推荐行CT随访的观点。
编译如下(约622字):
低剂量螺旋CT分辨良性和恶性非钙化性肺结节的能力
Steven B. Markowitz, MD; Albert Miller, MD, FCCP; Jeffrey Miller, MD; Amy Manowitz, MS; Sylvia Kieding, BA; Lee Sider, MD and Alfredo Morabia, MD, PhD
研究目标:低剂量螺旋CT扫描能够确定早期的肺恶性病变,以及很大一部分诊断和预后意义不明的肺结节(也就是,未确诊结节)。这些由作为肺癌筛查程序之一的CT扫描检测到的未确诊结节的敏感性、特异性和预测价值尚未得到确认。因此我们通过跟踪病例至少18个月,计算了CT检测肺结节的敏感性、特异性和预测价值。
设计:纵向随访的单侧筛查实验。
地区:美国农村,2000-2004年。
参与者:农民和在职的核武器工人,45岁,包括有吸烟史与无吸烟史,并且有职业性的肺致癌物的接触史。
检查:总共约4401人参与了肺癌的肺部CT扫描,首先是全胸腔低剂量CT扫描,然后对未确诊肺部结节(即,不能立刻怀疑为肺癌的结节)每隔3、6和12个月行间断CT扫描,最后于第18个月行全胸腔低剂量CT扫描。
结果:我们成功地完成了对有未确诊或疑似肺结节的807名参与者中的95%以上的人的最短18个月的随访。727名未确诊结节中仅有3个在后续的18个月中被确认为恶性。放射医师对疑似结节诊断的敏感度为84.2%,特异度为96.6%。考虑早期肺癌2.4%的可能性,阳性和阴性预测价值分别为37.2%和99.6%。总的来说,我们发现了33例原发性肺癌,包括1期19例,2期5例,3-4期7例,以及3例局限期的小细胞肺癌。
结论:螺旋CT扫描检测了一些未确诊结节,但是很少为恶性。检测早期肺癌,CT扫描具有高度特异性和敏感性。假阳性的问题导致螺旋CT扫描应用的局限性,应理性的对待。结果支持当前推荐行CT随访的观点。 |
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