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Japanese Journal of Clinical Oncology 2008 38(8):578-579; doi:10.1093/jjco/hyn070
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© The Author (2008). Published by Oxford University Press. All rights reserved

Comparison of Time Trends in Testicular Cancer Incidence (1973–97) in East Asia, Europe and USA, from Cancer Incidence in Five Continents Vols IV–VIII

Tomohiro Matsuda and Kumiko Saika

Cancer Information Services and Surveillance Division
Center for Cancer Control and Information Services
National Cancer Center
Tokyo, Japan

Time trends of age-standardized rate (ASR) of testicular cancer incidence (ICD-10: C62) were compared among 18 selected cancer registries and ethnic/racial groups in East Asia, Europe and USA. The data source was the Cancer Incidence in Five Continents Vols IV–VIII (years at diagnosis: 1973–77, 1978–82, 1983–87, 1988–92 and 1993–97, respectively). World population was used for age-standardization.

Figure 1 shows time trends of ASR of testicular cancer incidence. In East Asia, the three registries (Miyagi, Nagasaki and Osaka) in Japan and two registries in China (Shanghai and Hong Kong) showed low ASRs, less than two per 100 000 and a stable trend during the observation period. The ASR in Miyagi increased slightly. In Europe, testicular cancer incidence was higher than the other regions. Of the European registries, Denmark and Bas-Rhin (France) had remarkably higher ASRs compared with the others. The ASR in France was not as high as Denmark in the period of 1973–77; however, the trend of the ASRs showed a steep increase from 1973–77 to 1993–97; the incidence reached ASRs of almost eight. Sweden, South Thames (England) and West Midlands (England) showed an increasing trend as well, but the increase was moderate and the ASRs remained comparatively low. Testicular cancer incidence rate in Varese (Italy) leveled off from 1978–82 to 1993–97 at around four per 100 000. In USA, white [Surveillance, Epidemiology and End Results (SEER)] had a clearly higher ASR of testicular cancer incidence than the others, and the ASR was increasing. Among non-white ethnic groups, Japanese in LA and Japanese and Chinese in Hawaii seemed to have higher ASRs than Chinese and Korean in LA and black (SEER), and the ASRs were also higher than those of their country of origin. However, the time trends of the testicular cancer incidence of Japanese in LA and Japanese and Chinese in Hawaii were not evident because of the wide fluctuations in ASR.


Figure 1
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  		Figure 1. Time trends in age-standardized testicular cancer incidence rate (ICD-10: C62) in 18 cancer registries in East Asia, Europe and USA.

Note: Data were downloaded from IARC CANCER Mondial Statistical Information System (http://www-dep.iarc.fr/). Data of number of incidence and population for Vols IV–VIII were extracted from the file named CI5I-VIII_September_2005.ZIP and tabulated by the authors of this article. Periods of year at diagnosis were representative, and they included the following exceptions: the first period was 1975 for Shanghai (China), 1974–77 for Hong Kong (China), 1975–77 for Bas-Rhin (France), 1973–76 for West Midlands (England); the second period was 1979–82 for West Midlands (England); the first period (1976–77) of Varese (Italy) was excluded because there were no data for several age groups. Note that calculated incidence rates were values averaged across 5 years, which could have rounded rapid annual changes (a spike or drop). Responsibility for this presentation and interpretation lies with the authors of this article. LA: Los Angeles, SEER: Surveillance Epidemiology and End Results.

 


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