Background: Breast cancer (BC) is the most common cancer among women worldwide, accounting for more than 2.3 million new cases annually. Although chronic inflammation is a well-established risk factor for cancer, the association between mastitis and BC has not yet been clearly established. Therefore, this study aims to investigate mastitis as a potential risk factor for BC. Methods: We performed a random-effects meta-analysis to estimate the odds ratio (OR) and hazard ratio (HR).
