TY - JOUR

T1 - Visual assessment of early emphysema and interstitial abnormalities on CT is useful in lung cancer risk analysis

AU - Wille, Mathilde M. W.

AU - Thomsen, Laura H.

AU - Petersen, Jens

AU - de Bruijne, Marleen

AU - Dirksen, Asger

AU - Pedersen, Jesper H.

AU - Shaker, Saher B.

PY - 2016

Y1 - 2016

N2 - Objectives: Screening for lung cancer should be limited to a high-risk-population, and abnormalities in low-dose computed tomography (CT) screening images may be relevant for predicting the risk of lung cancer. Our aims were to compare the occurrence of visually detected emphysema and interstitial abnormalities in subjects with and without lung cancer in a screening population of smokers. Methods: Low-dose chest CT examinations (baseline and latest possible) of 1990 participants from The Danish Lung Cancer Screening Trial were independently evaluated by two observers who scored emphysema and interstitial abnormalities. Emphysema (lung density) was also measured quantitatively. Results: Emphysema was seen more frequently and its extent was greater among participants with lung cancer on baseline (odds ratio (OR), 1.8, p = 0.017 and p = 0.002) and late examinations (OR 2.6, p < 0.001 and p < 0.001). No significant difference was found using quantitative measurements. Interstitial abnormalities were more common findings among participants with lung cancer (OR 5.1, p < 0.001 and OR 4.5, p < 0.001).There was no association between presence of emphysema and presence of interstitial abnormalities (OR 0.75, p = 0.499). Conclusions: Even early signs of emphysema and interstitial abnormalities are associated with lung cancer. Quantitative measurements of emphysema—regardless of type—do not show the same association. Key Points: • Visually detected emphysema on CT is more frequent in individuals who develop lung cancer. • Emphysema grading is higher in those who develop lung cancer. • Interstitial abnormalities, including discrete changes, are associated with lung cancer.• Quantitative lung density measurements are not useful in lung cancer risk prediction.• Early CT signs of emphysema and interstitial abnormalities can predict future risk.

AB - Objectives: Screening for lung cancer should be limited to a high-risk-population, and abnormalities in low-dose computed tomography (CT) screening images may be relevant for predicting the risk of lung cancer. Our aims were to compare the occurrence of visually detected emphysema and interstitial abnormalities in subjects with and without lung cancer in a screening population of smokers. Methods: Low-dose chest CT examinations (baseline and latest possible) of 1990 participants from The Danish Lung Cancer Screening Trial were independently evaluated by two observers who scored emphysema and interstitial abnormalities. Emphysema (lung density) was also measured quantitatively. Results: Emphysema was seen more frequently and its extent was greater among participants with lung cancer on baseline (odds ratio (OR), 1.8, p = 0.017 and p = 0.002) and late examinations (OR 2.6, p < 0.001 and p < 0.001). No significant difference was found using quantitative measurements. Interstitial abnormalities were more common findings among participants with lung cancer (OR 5.1, p < 0.001 and OR 4.5, p < 0.001).There was no association between presence of emphysema and presence of interstitial abnormalities (OR 0.75, p = 0.499). Conclusions: Even early signs of emphysema and interstitial abnormalities are associated with lung cancer. Quantitative measurements of emphysema—regardless of type—do not show the same association. Key Points: • Visually detected emphysema on CT is more frequent in individuals who develop lung cancer. • Emphysema grading is higher in those who develop lung cancer. • Interstitial abnormalities, including discrete changes, are associated with lung cancer.• Quantitative lung density measurements are not useful in lung cancer risk prediction.• Early CT signs of emphysema and interstitial abnormalities can predict future risk.

KW - Comorbidity

KW - Computed tomography

KW - Emphysema

KW - Interstitial abnormalities

KW - Lung cancer

U2 - 10.1007/s00330-015-3826-9

DO - 10.1007/s00330-015-3826-9

M3 - Journal article

C2 - 25956938

VL - 26

SP - 487

EP - 494

JO - European Radiology

JF - European Radiology

SN - 0938-7994

IS - 2

ER -