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Low-dose computed tomography screening for lung cancer in a general population: characteristics of cancer in non-smokers versus smokers.

Abstract：

RATIONALE AND OBJECTIVES:To report the detection rate for lung cancers in computed tomography (CT) screening in Japanese adults, and to analyze differences in the appearance of the cancers in non-smokers versus smokers. MATERIALS AND METHODS:Subjects consisted of 7,847 Japanese adults who received low-dose CT screening at least once in a 3-year period. The detection rate of lung cancers and the correlation of imaging, clinical, and pathologic findings of cancers in non-smokers versus smokers were examined. RESULTS:The detection rate for lung cancer was 1.1% for both non-smokers (45 of 4,251) and smokers (39 of 3,596). The prevalence of well-differentiated adenocarcinomas was greater in non-smokers (88%; 22 of 25) than in smokers (29%; 4 of 14) (P < .001). The prevalence and incidence of pathologic stage IA disease were greater in non-smokers than in smokers (92%; [22 of 24] vs 58% [7 of 12], and 100% [19 of 19] vs 70% [14 of 20]) (both P < .05). The mean size of the tumors in the non-smokers (12.4 mm) was smaller than that in smokers (18.2 mm) (P < .001). The percentage of cancers categorized as pure or mixed ground-glass opacity (86%; 38 of 44) on CT was greater in non-smokers than in smokers (46%; 16 of 35) (P < .001). CONCLUSION:Most of the lung cancers in non-smokers were slow-growing adenocarcinomas appearing as faint ground-glass opacities on CT, whereas rapidly growing cancers appearing as solid nodules were more commonly seen in smokers.

journal_name

Acad Radiol

journal_title

Academic radiology

authors

Li F,Sone S,Abe H,MacMahon H,Doi K

doi

10.1016/s1076-6332(03)00150-8

keywords:

subject

Has Abstract

pub_date

2003-09-01 00:00:00

pages

1013-20

issue

9

eissn

1076-6332

issn

1878-4046

journal_volume

10

pub_type

杂志文章

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