MLO view from screening mammogram 16 years prior to presentation.There is a focal asymmetry in the central inner right breast at posterior depth. This focal asymmetry was biopsied, and pathology revealed stage IA estrogen receptor-positive/progesterone receptor-positive/human epidermal growth factor receptor 2-negative (ER+/PR+/HER2-) invasive ductal carcinoma and ductal carcinoma in situ (DCIS).MLO: mediolateral oblique