BRCA2 and breast cancer: Increasing age, the presence of genetic mutations, such as BRCA2, and exposure to certain hormonal and environmental factors have been cited as factors increasing the risk of this disease. This study aimed to investigate the incidence, death, and burden of male breast cancer, measured in years lived with disability (YLD) across the following three socioeconomic categories in the Commonwealth of Nations: high-, middle-, and low-income.