Volume 22, Issue 12 pp. 2238-2241

Low prevalence of human T cell lymphotropic virus type 1 infection in patients with gastric cancer

Tetsuo Hirata

Corresponding Author

Tetsuo Hirata

Division of Control and Prevention of Infectious Diseases, Department of Medicine and Therapeutics, Faculty of Medicine, University of the Ryukyus, and

T Hirata, Division of Control and Prevention of Infectious Diseases, Department of Medicine and Therapeutics, Faculty of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa, Japan. Email: [email protected]Search for more papers by this author
Manabu Nakamoto

Manabu Nakamoto

Department of Endoscopy, Ryukyu University Hospital, Okinawa, Japan

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Masamoto Nakamura

Masamoto Nakamura

Department of Endoscopy, Ryukyu University Hospital, Okinawa, Japan

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Nagisa Kinjo

Nagisa Kinjo

Department of Endoscopy, Ryukyu University Hospital, Okinawa, Japan

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Akira Hokama

Akira Hokama

Division of Control and Prevention of Infectious Diseases, Department of Medicine and Therapeutics, Faculty of Medicine, University of the Ryukyus, and

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Fukunori Kinjo

Fukunori Kinjo

Department of Endoscopy, Ryukyu University Hospital, Okinawa, Japan

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Jiro Fujita

Jiro Fujita

Division of Control and Prevention of Infectious Diseases, Department of Medicine and Therapeutics, Faculty of Medicine, University of the Ryukyus, and

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First published: 19 November 2007
Citations: 12

Abstract

Background and Aim: There have been few studies on the association between human T cell lymphotropic virus type 1 (HTLV-1) infection and cancer risk. It is still controversial whether or not HTLV-1 infection affects the incidence of several cancers. With this background, we aimed to evaluate the relationship between HTLV-1 infection and the occurrence of several types of cancers.

Methods: Subjects were 699 patients with cancer aged 50 years and older diagnosed between 1991 and 2004 at the Department of Medicine and Therapeutics, Ryukyu University Hospital, Okinawa, Japan, and 1365 control patients without cancer. The association between HTLV-1 infection and cancer (biliary tract, pancreatic, esophageal, gastric, colorectal, liver, and lung cancers) was analyzed by logistic regression analysis adjusted for age and sex.

Results: The infection rate of HTLV-1 in patients with gastric cancer was significantly lower than in controls (P = 0.01, adjusted odds ratio 0.46). The infection rate of HTLV-1 was not associated with increased or decreased risk of cancers other than gastric cancer.

Conclusion: Our study indicated that the prevalence of HTLV-1 infection in patients with gastric cancer appears to be significantly lower than that in control patients.

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