Bilateral invasive ductal carcinoma of the breast; a case report with literature review.

Introduction: Carcinoma of breast is a heterogeneous disease. Using their light microscopic appearance, the invasive forms are usually divided into three main types: infiltrating lobular carcinomas, infiltrating ductal carcinomas, and other infiltrating carcinomas. This paper aims to discuss and report a case of bilateral invasive ductal carcinoma of the breast. Case report: A 48-year-old female presented with bilateral breast masses of 5-month duration. On examination. she had bilateral palpable breast masses, which were hard, mobile, and irregular. On the right side, there was skin tethering and palpable axillary lymph nodes. Ultrasound examination showed a heterogeneous, irregular, ill-defined, mass-like lesion, seen in the upper outer quadrant of the right breast along with a hypoechoic. irregular mass 12*13mm in the upper outer quadrant of the left breast. FNA showed bilateral invasive ductal carcinoma. Right axillary lymph nodes were positive for adenocarcinoma. She received 4 sessions of NACT which was followed by right-side mastectomy with axillary lymph node dissection and left-side mastectomy with sentinel lymph node biopsy. Discussion: Bilateral breast carcinomas are very rare. They form 2-5% of all breast malignancies. About 2-11% of breast cancer patients develop cancer in the opposite breast in their lifetime with an incidence rate varying from 4 to 8 per 1000 people per year. Conclusion: Bilateral carcinoma of the breast is very rare. Microscopically, the findings usually reveal infiltrative ductal carcinoma. The treatment of choice is bilateral modified radical mastectomy.