Original article: general thoracicPeripheral lung adenocarcinomas: 10 mm or less in diameter
Section snippets
Material and methods
Subjects consisted of 57 patients without preoperative treatment who had a peripheral lung adenocarcinoma of 10 mm or less in diameter (group 1). They were selected from 414 patients who underwent resection of a primary lung cancer in the Department of General Thoracic Surgery at Shizuoka Saiseikai General Hospital between April 1, l992, and June 30, 2002. Group 1 was compared with group 2, which consisted of 32 patients with an adenocarcinoma of 11 to 15 mm in diameter that was curatively
Clinical characteristics
The data are listed in Table 1. The mean age in group 1 was 61.7 years. Subjective symptoms were observed in only one case. There was no statistically significant difference in age and symptoms among the three groups. Group 1 consisted of a significantly larger number of women (45 cases, 78.9%) than the other two groups (50.0% in group 2 and 57.1% in group 3; p = 0.005, p = 0.03, respectively). Nonsmokers were prevalent in all groups, especially in group 1 with 44 cases (77.2%), which was
Comment
The percentage of women with small-sized lung adenocarcinomas has been reported as 52.2% [3] and 58.3% [9], which are equivalent to the percentages found in groups 2 and 3. However, the 78.9% found in group 1 was significantly higher than those. The risk of smoking in lung adenocarcinoma has remained low when compared with other histologic types of lung cancer, although it is now increasing in the United States and Japan. The risk of death as a result of lung adenocarcinoma for smokers has been
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