Synchronous bilateral breast cancer with different histology

Synchronous bilateral breast cancer is a rare clinical entity. And due to both an improved prognosis and growing life expectancy on early detection, we have brought interest in case of patient with synchronous breast cancer. This study reports a case of synchronous bilateral breast cancer in an asymptomatic 70-year-old woman with a positive family history of breast cancer. This woman was diagnosed through radiological screenings, including mammograms, ultrasonography, and magnetic resonance imaging (MRI). On histopathologic examination of the core biopsy, the left breast mass was a Nottingham grade I invasive carcinoma of no particular type. The right breast mass was a Nottingham grade I invasive carcinoma with a mucinous component. After lumpectomies ultrasonography of the surgical specimens confirmed a small biopsy-proven invasive ductal cancer hypoechoic mass in the left breast, with an irregular margins and proven mucinous cancer mass in the right breast. The case was finally diagnosed as synchronous bilateral breast cancer of different pathologic types (ductal and mucinous).