Abstract：Objective To analyze the CT findings and pathological basis of complete or most cystic lung cancer and cavitary lung cancer.Methods A retrospective analysis of chest CT findings in 30 patients with pathologically confirmed lung cancer from January 2017 to January 2018 and 38 patients with complete or most cystic lung cancer was performed.The pathological manifestations of the two types were comparatively analyzed.Results On CT images,in 30 thin-walled cavitary lung cancer,CT images showed wall thickness was 2-4 mm,no “air-liquid level sign”,unsmooth inner wall,and surrounding patch cords in 4 cases.The CT findings of 38 patients with cystic lung cancer were mainly cystic changes in the lung,19 cases were in complete cystic changes with smooth and sharp edges and unified inner density in water-like density,and two of them were combined with “air-liquid level”.For the rest 19 cases,most of them were in cystic changes presenting with uneven wall thickness,and some strip-like and nodular thickening.With regard to pathological changes,in the thin-walled cavitary lung cancer,4 cases were squamous cell carcinoma and 26 cases were adenocarcinoma.Under light microscopy,a large number of cancer cells in the necrotic area,or a large number of cancer cells combined with small necrotic areas.Among the cystic lung cancers,29 were adenocarcinomas and 9 were squamous cell carcinomas.Under light microscopy,there were large necrotic areas or a large number of fibrosis and fibrotic tissue degeneration,and a few pathological sections were presented with a large number of cancer cells combined with small necrotic areas.Conclusion CT can identify cystic lung cancer from thin-walled cavitary lung cancer,and the thin wall malignant lesions with irregular inner wall should be alert to lung cancer.
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