Estimating the 5-Year Breast Cancer Prognosis in a Cohort Residentially Exposed to Hazards at Hermosillo, Sonora, Mexico

Abstract

Breast cancer is considered the most common type of cancer diagnosed in women worldwide and the leading cause of female cancer-related deaths in developing countries Ferlay [1]. In Mexico, the National Institute of Statistics and Geography (INEGI) indicated breast cancer as the main cause of female morbidity in 2014 INEGI [2]. A population-based study showed breast cancer as the leading cause of cancer mortality in Mexican women from the period 20002013 Mohar-Betancourt [3]. Studies by the Health Secretary of Mexico (SS) also showed breast cancer as the main cause of cancerrelated deaths in 2002. Given the high mortality and morbidity rates in Mexico, the estimation of breast cancer prognosis or overall survival rate of 5 years, is crucial to provide an overview of the patient’s scenario long-term. The assessment of breast cancer prognosis considers both tumor characteristics and cancer risk factors, seeking to determine the best therapeutic approach for the patient [4]. There are distinct criteria for estimating the overall 5-year survival for breast cancer. Most validated tools consider tumor characteristics (hormonal status, stage, size), potential invasion to lymph nodes, age, and screening methods for breast ABSTRACT