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Int J Med Sci 2012; 9(1):68-73. doi:10.7150/ijms.9.68

Research Paper

Clinicopathological Characteristics and Prognosis of Non-Small Cell Lung Cancer Patients Associated with a Family History of Lung Cancer

Shuji Haraguchi1, 2✉, Kiyoshi Koizumi1, 2, Iwao Mikami1, 2, Okamoto Junichi1, 2, Yoshihito Iijima1, 2, Takayuki Ibi1, 2, Kazuo Shimizu2

1. Department of Surgery, Division of Thoracic Surgery, Nippon Medical School, Tokyo, Japan.
2. Department of Biological Regulation and Regenerative Surgery, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan.

Abstract

Introduction: Clinicopathological characteristics and prognosis of non-small cell lung cancer (NSCLC) patients with a family history of lung cancer (FHLC) have not been well established.

Methods: Clinical records of patients with NSCLC treated at our institute from 1982 to 2010 were reviewed with special reference to family history of lung cancer and clinicopathological factors including patient's outcome. Univariate analyses of the factors between the groups of FHLC and non-FHLC were performed using unpaired two-tailed t tests or the chi-square test. The Cox proportional hazards model was used to evaluate the hazard ratio of death.

Results: Of the 1013 NSCLC patients, 124 (12.2%) had a FHLC of whom 119 (96%) were the first-degree relatives. The frequency of early stages of lung cancer was high in both groups of FHLC and non-FHLC patients. Patients with FHLC had a significantly higher frequency of early pathological stages and a prepomderance of adenocarcinoma, and a hazard ratio of death of 0.870 (95% confidence interval: 0.599-1.263, p value: 0.465) compared with the non-FHLC patients.

Conclusions: NSCLC patients with FHLC could be characterized by early pathological stages and preponderance of adenocarcinoma, however they were not at a decreased hazard ratio of death. These findings emphasize the importance of early detection of lung cancer and employment of less invasive therapeutic interventions.

Keywords: non-small cell lung cancer, family history of lung cancer, clinicopathological characteristics, prognosis, hazard ratio of death.

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How to cite this article:
Haraguchi S, Koizumi K, Mikami I, Junichi O, Iijima Y, Ibi T, Shimizu K. Clinicopathological Characteristics and Prognosis of Non-Small Cell Lung Cancer Patients Associated with a Family History of Lung Cancer. Int J Med Sci 2012; 9(1):68-73. doi:10.7150/ijms.9.68. Available from http://www.medsci.org/v09p0068.htm