Breast cancer is the most common malignancy in women with an age related increase in incidence ranging from 1 in 50 at age 50 to 1 in 10 at age 80. This is particularly significant in view of the changing demographics in the western population, characterised by an aging population and increased life expectancy. However in spite of favourable prognostic factors and less aggressive biological behaviour, elderly breast cancer patients receive less aggressive treatment when compared with their younger counterparts. Appropriate treatment should be offered depending on physiological reserve and comorbidities. Primary endocrine treatment has been shown to be associated with significant morbidity in terms of disease progression. Prompt surgery and adjuvant treatment can decrease relapse and improve survival. Radiation therapy is shown to decrease local relapse and chemotherapy may have a role in a select group of patients with adverse prognostic factors. With incidence of breast cancer bound to increase in the elderly population, it is essential to establish optimum therapy in this cohort of patients as studies reveal good outcome from standard treatment. ' 2007 Wiley-Liss, Inc.Key words: elderly breast cancer; primary endocrine treatment; conservative surgery; radiotherapy; chemotherapy Breast cancer is the most common malignancy in women and the incidence increases with age: 1 in 50 at age 50, 1 in 14 by age 70 and 1 in 9 by age 85. With changing demographics in the western hemisphere characterized by an aging population and increased life expectancy, the total incidence of breast cancer can be expected to increase with peak incidence occurring between 70 and 84 years.1 In the United States, women over the age of 65 have become a prominent cohort in the breast cancer population, with approximately 50% of all new breast cancers occurring in women aged 65 years and older and 25% occur after the age of 75 years.