Epidemiology of Female Breast Cancer in West Jakarta, Indonesia

Background: Breast cancer was the most common cancer in the world. GLOBOCAN 2012 estimated the incidence of female breast cancer in Indonesia was 40.3 per 100,000 and the mortality rate was 16.6 per 100,000. In 2016, Dharmais National Cancer Center was appointed as Regional Population Based Cancer Registry in West Jakarta. West Jakarta was a municipality with 2,281,945 populations, being the 2nd largest population in DKI Jakarta Province. Aim: This study was to evaluate the quality of population based cancer registry data and to describe the epidemiology of female breast cancer in West Jakarta, Indonesia during 2008-2012 and to compare with GLOBOCAN 2012 . Methods: We used population based cancer registry data with ICD - O code C50.0-C50.9 in female who live in West Jakarta. The population based cancer registry data were collected in Dharmais National Cancer Center. We evaluated the quality of population based cancer registry data based on WHO-IARC rules for cancer registry data. Results: The quality of population based cancer registry data were microscopic verification (70%); DCO percentage (20.8%), and unknown age (0%). The trend of female breast cancer was increasing during 2008-2012. Age-standardized rate incidence was 19.3 per 100,000. The most of frequent were in 45-49 years old, not other specific location subtopography (81.5%), the histopathology type was ductal and lobular neoplasm (51.8%), in stage III (44%), and with metastases to bone (34%). The average of length of duration was 29.1 months, most of them were unknown of last status contact (84%). Conclusion: The coverage and quality data of West Jakarta population based cancer registry need to be increased and establish a follow-up system to decrease the unknown last contact status of patients.