Incidental bilateral synchronous invasive breast cancer in a patient with low back pain

Bilateral synchronous invasive breast cancer is rare with an incidence of less than 3%. In the majority of the patients, the contralateral breast tumor is often diagnosed when noticing the lesion in the other breast during the physical examination due to a mass. Infrequently, the patient may be totally asymptomatic, as seen in this presented case. In this report, we present a rare case presenting with low back pain, which was then incidentally diagnosed as bilateral breast carcinoma.