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Lung cancer patients who are asymptomatic at diagnosis show favorable prognosis: A Korean Lung Cancer Registry Study

Authors
In, Kwang-HoKwon, Yong-SooOh, In-JaeKim, Kyu-SikJung, Maan-HongLee, Kwan-HoKim, Sun-YoungRyu, Jeong-SeonLee, Sung-YongJeong, Eun-TaikLee, Sang-YeubYum, Ho-KeeLee, Chang-GeolKim, Woo-SungZo, Jae-IllKim, HojoongKim, Young-WhanKim, Se-KyuLee, Jae-CheolKim, Young-Chul
Issue Date
5월-2009
Publisher
ELSEVIER IRELAND LTD
Keywords
Lung neoplasms; Registries; Epidemiology; Survival; Korea
Citation
LUNG CANCER, v.64, no.2, pp.232 - 237
Indexed
SCIE
SCOPUS
Journal Title
LUNG CANCER
Volume
64
Number
2
Start Page
232
End Page
237
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120158
DOI
10.1016/j.lungcan.2008.08.005
ISSN
0169-5002
Abstract
Purpose and methods: The outcomes of lung cancer patients who were asymptomatic at diagnosis have never been reported as part of a large-scale study. A national survey of lung cancer in South Korea registered a total of 8788 patients diagnosed in 2005. We report the results herein, with an emphasis on the prognosis of the asymptomatic lung cancer patients. Results: Adenocarcinoma was the most frequent (36.1%) histopathologic type, followed by squamous cell carcinoma (32.1%), large cell carcinoma (1.5%), and small cell carcinoma (13.5%). In most cases, lung cancer was detected with subjective symptoms, but 6.5% of cases had no symptoms indicative of lung cancer at the time of diagnosis. Compared to symptomatic patients, asymptomatic patients were younger, more often female, non-smokers, and more frequently presented with adenocarcinoma. Initial treatments were surgery (22.1%), radiation therapy (7.8%), chemo-radiation therapy (5.4%), and chemotherapy (38%), while 26.6% of patients were recorded to have supportive care only. Asymptomatic patients received surgery in 60.0% of cases, and they showed significantly longer survival times than symptomatic patients. Absence of symptoms at diagnosis significantly reduced the risk of death from non-small cell lung cancer, regardless of patient age, patient gender, stage at diagnosis, smoking history, or whether treatment was performed, but did not reduce the risk of death from small cell lung cancer. Conclusions: Adenocarcinoma has grown to be the leading histopathologic type of lung cancer in South Korea. Absence of symptom at diagnosis is a favorable prognostic factor for patients with non-small cell lung cancer. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
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