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CT Evaluation of Bronchogenic Carcinoma（with 1418 cases reports）
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肖湘生 李成州 刘士远 李惠民
上海第二军医大学长征医院影像科
Xiao Xiangsheng，Li Chengzhou，Liu Shiyuan，et al.
Department of Radiology，Changzheng Hospital，The Second Military Medical University，Shanghai 200003
Purpose：To explore CT manifestion of peripheral lung cancer and evaluate CT diagnostic accuracy of lung cancer.
Materials and Methods：1418 cases of pathologically proved lung cancer were involved，with 788 peripheral，517 central，24 infiltrative，14 multifoci and 75 others. CT diagnoses were compared with pathology and features of peripheral cancer were analysed.
Results：Of all 1418 cases，the diagnostic accuracy rate was 98.2％（1393/1418），and the misdiagnostic rate was 1.8％（25/1418）. Lobulation，spicular and pleural idendation were the most important sign of peripheral lung cancer，with occurrence of 56.9％，46.2％ and 35.0％，respectively. Vocule sign was observed in 17.1％ of peripheral bronchogenic carcinoma，whereas in 64.9％ of <3 cm lession. Contrast enhancement was useful to differentiate malignant nodule from benign ones. The sensitivity was 96.3％ and 100％ with 20HU and 15HU enhancement value as threshold respectively.
Conclusion：Lobulation，spiculate，pleural indentation and contrast enhancement are the most important sign of peripheral lung cancer. The comprehensive analysis of CT features may improve the diagnostic accuracy of lung cancer.
Keywords：Bronchogenic carcinoma Imaging CT Accuracy | 
