Abstract
Purpose
To investigate the differentiating computed tomographic (CT) features between adenocarcinoma in situ (AIS) with alveolar collapse and minimally invasive adenocarcinoma (MIA) or invasive adenocarcinoma (IA) appearing as part-solid nodules.
Methods
A total of 147 consecutive patients with 157 pathology-confirmed part-solid ground-glass nodules (GGNs) ≤ 20 mm without other pathological condition such as inflammation and fibrosis who underwent chest CT were included.
Results
The 157 part-solid GGNs included 33 (21.02%) pathologically confirmed AISs with alveolar collapse. Multivariate analysis revealed that smaller lesion size (odds ratio [OR] 0.671), and well-defined border (OR 5.544), concentrated distribution (OR 7.994), and homogeneity of the solid portion (OR 4.365) were significant independent predictors for differentiating AIS with alveolar collapse from MIA (P < 0.05) with excellent accuracy (area under receiver operating characteristic [ROC] curve, 0.902). Multivariate analysis revealed that smaller lesion size (OR 0.782), and size (OR 0.821), well-defined border (OR 5.752), and homogeneity of solid portion (OR 6.182) were significant independent predictors differentiating AIS with alveolar collapse from IA (P < 0.05) with excellent accuracy (area under ROC curve 0.910).
Conclusion
Among part-solid GGNs, AIS with alveolar collapse can be accurately differentiated from MIA on the basis of smaller lesion size, well-defined border, concentrated distribution, and homogeneity of solid portion, and from IA according to smaller lesion size, and smaller size, well-defined border, and homogeneity of solid portion.
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Abbreviations
- AIS:
-
Adenocarcinoma in situ
- ATS:
-
American Thoracic Society
- AUC:
-
Area under the curve
- CT:
-
Computed tomography
- ERS:
-
European Respiratory Society
- GGN:
-
Ground-glass nodule
- GGN:
-
Ground-glass nodules
- HU:
-
Hounsfield Units
- IA:
-
Invasive adenocarcinoma
- IASLC:
-
International Association for the Study of Lung Cancer
- ICC:
-
Intra-class correlation coefficient
- IPA:
-
Invasive pulmonary adenocarcinoma
- MIA:
-
Minimally invasive adenocarcinoma
- OR:
-
Odds ratio
- ROC:
-
Receiver operating characteristic
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Acknowledgements
This work was supported by grants from the Scientific Research Foundation of Ministry of Public Health of China/Major Science and Technology Program of Medicine and Health of Zhejiang Province of China (grant no. WKJ2014-2-021), Heath and Family Planning Commission of Zhejiang Province (grant no. 2015ZDA032) and Public Project of Science Technology Department of Zhejiang Province of China (grant no. 2015C33254).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by LX, SL and YZ. The first draft of the manuscript was written by LX and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Xu, L., Lin, S. & Zhang, Y. Differentiation of adenocarcinoma in situ with alveolar collapse from minimally invasive adenocarcinoma or invasive adenocarcinoma appearing as part-solid ground-glass nodules (≤ 2 cm) using computed tomography. Jpn J Radiol 40, 29–37 (2022). https://doi.org/10.1007/s11604-021-01183-9
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DOI: https://doi.org/10.1007/s11604-021-01183-9