Imaging Characteristics and Prognostic Value of Isolated Pulmonary Metastasis from Colorectal Cancer Demonstrated with¹⁸F-FDG PET/CT

Table 3

Multivariate analysis of the clinical and radiological factors predictive of isolated lung metastasis compared with second primary lung cancer in single lung lesions.

Factors	Risk factor for metastasis	Risk ratio (95% CI)	-value
Gender	Female		0.131
Maximal diameter of lung lesion (mm)	<21.65		0.395
CT finding
Polygonal shape	—		0.260
Ill-defined margin	—		0.128
Pleural indentation	—		0.308
Air bronchogram	—	22.327 (1.910-261.061)	0.013
Spiculation	—	6.148 (1.469-25.725)	0.013
Ground-glass opacity	—		0.104

CI: confidence interval. Statistically significant -values are highlighted in bold.