Background: Lung cancer is the most common cancer related death in the world for the both male and female as well. Adenocarcinoma is the most common pathological type which is in increasing trend. With recent advancement of screening of lung cancer with HRCT, GGO lesion has been noted frequently. GGO is a nonspecific finding that may be caused by various disorders, including inflammatory diseases, focal fibrosis, atypical adenomatous hyperplasia, bronchoalveolar carcinoma (BAC), and adenocarcinoma.This study intends to analyze the correlation between high resolutions computed tomography (HRCT) findings and the pathological findings of lung adenocarcinoma. Material and methods: Retrospective review of 16 cases of lung adenocarcinoma lesions after surgical resection. Tumors were defined as air containing type based on ratio of maximum dimension of the tumor on mediastinal window to the maximum diameter of the tumor on lung window was≤50% and as solid density if the ratio was> 50%. The correlation between CT findings (homogenous/heterogeneous, airbronchogram, pleural tag, speculation, vascular involvement, pleural thickening, margin, shape) and pathological findings were investigated. Results: Of 3 air containing 2 were pre-invasive type and 1 was invasive. Among 13 solid density type all 13 were invasive type. Presence of speculation, heterogeneous appearance was found significantly associated with pathological invasion. Conclusion: Air containing type of small cells lung adenocarcinomas are preinvasive whereas solid densities are invasive. Speculation and heterogeneous are significant factor in invasive adenocarcinoma.

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