This is a presentation of four rare and interesting cases of bilateral breast cancer. The cases vary from Synchronous double primary carcinoma breast, bilateral infiltrating ductal carcinoma, bilateral synchronous metastatic carcinoma and metachronous breast carcinoma. The incidence of developing either primary or metastatic carcinoma in the other breast is increased in patients who already have carcinoma in one side and mammography contributes greatly to the detection of these lesions. (1) It is of significant prognostic value and important in deciding the clinical management based on the classification whether it is a primary or a secondary lesion.