Diagnostic Value of Enhanced Multi-slice Spiral and Risk Factor Analysis CT in Pulmonary Metastasis of Colorectal Cancer
Objective To investigate the diagnostic value of multi-slice spiral CT enhanced scanning technique for lung metastasis of colorectal cancer,and to analyze the risk factors of lung metastasis.Methods 223 patients with colorectal cancer who visited our hospital from January 2019 to February 2022 were enrolled as the study subjects to compare the diagnostic efficacy of X-ray and MSCT for lung metastasis of colorectal cancer.According to the different biopsy results,patients were divided into two groups,metastasis group and control group,and the clinical data between the two groups were analyzed and compared.Multiple logistic regression was used to analyze the risk factors affecting the lung metastasis of colorectal cancer.Results In the evaluation of the diagnostic indicators of colorectal cancer lung metastasis,MSCT has higher accuracy,and the sensitivity,specificity,positive and negative predictive values are higher than those of X-ray,with statistical differences(P＜0.05).11 of the 38 patients(28.95％)with lung metastases had＞3 lesions,the vast majority of lesions in MSCT images were solid nodules,68.35％had uneven margins,81.01％had lobulated lesions,54.43％had short burrs,82.28％had heterogeneous enhancement,and the proportion of long burr lesions was low,26.58％.Multiple logistic regression analysis suggested that the tumor originated from the rectum,elevated carcinoembryonic antigen expression as well as Dukes'C stage were independent risk factors for lung metastasis of colorectal cancer.Conclusion MSCT is of high value in the diagnosis of lung metastasis of colorectal cancer,with diverse imaging findings,and the primary site of the tumor is the rectum,elevated carcinoembryonic antigen expression and Dukes'C stage are independent risk factors for lung metastasis of colorectal cancer,contrast-enhanced MSCT scanning has certain significance for such patients.
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