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Vol.56 No.1 contents | Japanese/English |
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- Original Article -
Analysis of 2039 Hospitalized Patients with Pathologically Diagnosed Primary Lung Cancer -Experience of the Local Community Medical Association for 22 Years from 1991 to 2012-
Bumpei Kimura1, Takuya Nakajima1, Kenji Kusajima2, Kayoko Tsuchiya2, Noriyuki Tannai2, Maki Nunomura3, Tomoko Takano4, Yasushi Tsunemi4, Kan Katoh5, Etsuo Miyaoka61Department of Respiratory Surgery, 2Department of Respiratory Medicine, 3Department of Pathology, Tachikawa Sougo Hospital, Japan, 4Department of Respiratory Medicine, Oota Hospital, Japan, 5Department of Internal Medicine, Tokyo Kensei Hospital, Japan, 6Department of Mathematics, Tokyo University of Science, Japan
Purpose. The aim of this study was to report the present status of the diagnosis and therapy of primary lung cancer in local community medical organizations. Objects and Methods. A total of 2039 hospitalized patients with primary lung cancer in local community hospitals in Tokyo from 1991 to 2012 were divided into 2 groups, 1135 patients in the first half period (1991-2000) (first group) and 904 patients in the second half period (2001-2012) (second group), and a comparison between the 2 groups was performed regarding reasons for diagnosis, histological patterns, disease stage, therapeutic methods, performance status (PS) and the 5-year survival. Results. When comparing the reasons for diagnosis between the 2 groups, the ratios of a symptom: mass survey: other diseases were 54.8%: 18.2%: 26.9% in the first group and 46.2%: 22.7%: 30.9% in the second group. Furthermore, concerning the histological patterns in the 2 groups, the frequency of adenocarcinoma vs. squamous cell carcinoma were 48.5%: 30.7% and 54.1%: 22.9%, respectively. Regarding disease stage, stage I vs. stage IV was 24.1%: 36.6% and 31.2%: 39.7%, respectively. Regarding therapeutic methods, the ratios of surgical operation: chemotherapy and/or radiation therapy: palliative care were 36.7%: 26.6%: 34.5% and 36.3%: 33.0%: 27.4%, respectively. Taken together, the second group had higher frequencies of lung cancer discovered due to reasons other than a symptom, adenocarcinoma, stage I and IV, and chemotherapy and/or radiation therapy. Additionally, the ratios of PS 0 and 4 were increased in the latter group. Regarding the 5-year survival rate, it was increased in the second group (24.1% vs. 32.5%, respectively). Conclusion. The survival rate of patients with primary lung cancer can be increased when diagnosed at stage I of lung cancer during mass survey and with the treatment of other diseases.
key words: Primary lung cancer, Overall survival, Reasons of detection, Diagnostic imaging, Local community medical organization
Received: July 23, 2015
Accepted: November 12, 2015
JJLC 56 (1): 2-11, 2016
