Net Survival of Elderly Patients with Gynecological Cancer Aged Over 75 Years in 2006-2008

Document Type: Research Articles

Authors

1 Division of Cancer Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan.

2 Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.

3 Division of Cancer Information and Control, Aichi Cancer Center Research Institute, Nagoya, Japan.

4 Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.

5 All Japan Labour Welfare Foundation Tokai Clinic, Nagoya, Japan.

6 Division of Cancer Statistics Integration, Center for Cancer Control and Information Services, National Cancer Center, Tokyo, Japan.

7 Center for Cancer Registries, Center for Cancer Control and Information Services, National Cancer Center, Tokyo, Japan.

8 Department of Gynecologic Oncology, Aichi Cancer Center Hospital, Nagoya, Japan.

Abstract

Background: The number of elderly patients with gynecological cancer in Japan is increasing in line with the aging
of society. However, little has been reported on the survival of elderly patients aged 75 or older with gynecological
cancer in Japan. Methods: To clarify survival in women aged 75 years or older with gynecological cancer, we analyzed
data of 4,089 gynecological cancer cases (cervical cancer, 1,309 cases; endometrial cancer, 1,319 cases; and ovarian
cancer, 1,461 cases) in patients aged 75 or older from 21 population-based cancer registries in Japan, diagnosed in
2006-2008. We calculated the net survival (NS) of younger (75-79 years old), older (80-84 years old) and the oldest
age group (85-99 years old). We also calculated NS stratified by extent of disease and histological type. Results: Fiveyear
NS of cervical cancer patients was 54.5% in the younger age group, 40.8% in the older age group and 28.2%
in the oldest age group. Five-year NS of endometrial cancer patients was 64.5%, 51.6% and 39.0% in the younger,
older and oldest age groups, respectively. Five-year NS of ovarian cancer was 34.7%, 18.8% and 8.3%, respectively.
Conclusion: We estimated NS in elderly patients aged 75 years or older with gynecological cancers in Japan using
data from population-based cancer registries.

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