[Intentional limited resection for small adenocarcinoma with ground-glass opacity component more than 50% on computed tomography].

Fifty-eight patients who had small lung tumors 2 cm or less with ground-glass opacity (GGO) component more than 50% on high resolution computed tomography (HRCT) underwent intentional limited resection. After bronchioloalveolar carcinoma without both active fibroblastic proliferation and invasive sign to the stroma was confirmed, limited resection was completed in 50 patients. In 8 patients, procedure was converted lobectomy because of microscopic invasive sign in 4, active fibroblastic proliferation in 2, and other reasons in 2. Unexpected invasive sign was found by detailed post-operative examination in 2 cases. Five-year survival rate was 98% with a mean follow-up period of 48.8 months. A limitation of intra-operative diagnosis was revealed and the accuracy of diagnosis should be improved by not only intra-operative pathological diagnosis but also HRCT images.