CT Manifestation Characteristics Analysis of Cystic Lung Cancer
Objective Analyze the multi-slice spiral CT features and differential diagnosis of cystic lung cancer to improve diagnostic accuracy.Methods Retrospective analysis of CT features in 20 cases of cystic lung cancer confirmed by pathology.Results 20 cases of cystic lung cancer were all single cases,with 13 cases in the right lung and 7 cases in the left lung,including 17 cases of adenocarcinoma and 3 cases of squamous cell carcinoma.The morphology is mainly type Ⅲ.The shape is mostly elliptical(65％),with lesion edge lobulation sign(85％)and spiculation sign(75％),blurred lung tumor interface(85％),polycystic(60％),multiple fibrous septations within the cyst(60％),intracystic nodules(30％),extracystic nodules(20％),rough cyst wall(90％),no blood vessel formation in the cavity(70％),pleural indentation sign(70％),no satellite lesions(90％),no enhancement(90％),and no calcification(100％),No bronchial truncation(70％),no metastasis(70％),and morphological classification is more common in type Ⅲ(40％).20 lesions ranging in size from 8.0mm to 71.1mm,with an average of 35.3mm;The size of the cyst cavity is 5.0mm～57.0mm,with an average of 26.4mm;The thickness range of the cyst wall is 1.0mm～3.7mm,with an average of 2.4mm.Among the 10 dynamic follow-up cases,7 showed enlargement of wall nodules or cystic cavity,thickening of cyst wall,enlargement of peripheral halo signs,or worsening of pleural involvement.2 cases had cystic cavity disappearance replacing solid components,and 1 case had no significant changes.Conclusion The CT manifestations of cystic lung cancer have certain characteristics.When the cystic like structure in the lung shows signs such as thickening of the cyst wall,irregularity of the cyst wall,intracystic septa,nodules on the cyst wall,and blurred pericystic boundaries,caution should be exercised against the possibility of cystic lung cancer.
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